Mabel was born on August 31, 1999,. According to her, her first word was "unicorn." She claims to have shown a "natural gift" for art since she was two years old. She and Dipper were raised nonreligious, but celebrate all holidays at her insistence. Since the age of three, Mabel has celebrated Halloween in Piedmont with Dipper Pines. At age nine, she won a mini-golf tournament and from then on she has been amazing at it.
Arrival in Gravity Falls
Sometime early during the month of June, Mabel and her twin brother, Dipper, were sent from Piedmont, California to the small, sleepy town of Gravity Falls, Oregon to visit their great uncle, Grunkle Stan. Mabel believes that this is her "chance to have an epic summer romance," and shows her boy-crazy obsession when she agrees to date a very mysterious character, who says he is a teenage boy named Norman, after trying to date many other local boys. Little does she know that "he" is actually a group of gnomes, posing as a teenage boy. The gnomes ask her to be their queen and try to kidnap her when she refuses. Dipper aids in Mabel's escape and brings her back to the Mystery Shack on a golf cart. Mabel then defeats the gnomes by using a leaf blower. Stan allows them to take one thing from the Mystery Shack for free, and Mabel decides on a grappling hook, despite her Grunkle's suggestion of a doll.
Though it is not really told when this happened, Mabel and Dipper helped Stan make counterfeit money. From the context, it's implied that they got arrested and spent some time in a cold jail cell. On a second attempt to create family bonds, Mabel and Dipper get into Stan's car blindfolded and Stan drives them to the local lake to go fishing with him as a family bonding day. When she hears that there is a monster in the lake named the Gobblewonker, she and Dipper want to find it and get the proof after hearing about a contest awarding money if they find proof of a mythical creature. Mabel wants to discover it so she can buy a giant hamster ball to roll around in. They ditch Stan and go with Soos to find the monster. In the end, the Gobblewonker turns out to just be an old man in a robot, looking for attention. Feeling guilty for ditching their uncle, Mabel and Dipper soon go back to Stan to have their family bonding time.
When Mabel and Dipper discover Stan's old wax figure museum, Mabel creates a wax statue of Stan to make up for a melted Abraham Lincoln wax figure. When the opening ceremony turns sour and Wax Stan is found "decapitated" in the middle of the night, Mabel and Dipper search for the "murderer." Failing to do so, they attend Wax Stan's funeral, attended by the rest of the wax figures and Soos, only to realize the murderer wasn't a human at all. They fight off all the murderous wax figures using electric decorative candles and other heat-producing objects. Mabel throws their remains in the fire while Dipper deals with Wax Sherlock Holmes.
Mabel later learns of an alleged psychic in town named Gideon Gleeful and goes to one of his shows alongside with Dipper and Soos. The following day, she is greeted by Gideon and the two spend time together, ultimately leading to him asking her on a date, which she reluctantly agrees to. After the first date, however, Gideon incessantly invites her on more dates, and Mabel, driven by pressure and not knowing how to reject his offers, complies. Eventually, Dipper volunteers to end the relationship with Gideon for her, causing his sister great joy. When he carries out his promise, however, Gideon is enraged to the point of attempting to maim him, though Dipper is saved when Mabel intervenes, breaks up with Gideon herself and destroys Gideon's amulet. Back at the Mystery Shack, the Pines talk about their new enemy and mock him, while Gideon plots his revenge.
When Mabel goes to Dusk 2 Dawn with her brother, Wendy, and her friends, she stumbles upon a banned candy called Smile Dip. Mabel then eats about half of the shelf, or "beleventeen" as she puts it, and begins to hallucinate. She had a psychedelic fantasy of riding on a flying dolphin with two mouths and multiple human fists (two contained within said mouths) capable of shooting rainbows. Soon the store is taken over by ghosts and Ma and Pa possess Mabel to communicate with the teenagers. Afterward, Mabel becomes sick to her stomach and says that Smile Dip is "evil!"
Mabel immediately notices that Stan has a "thing" for Lazy Susan, the waitress at Greasy's Diner, so Mabel works some of her awesome "Mabel matchmaking magic" and decides that she should be the one to help Stan become more attractive and appealing to Lazy Susan. After having Soos pretend to be Lazy Susan for practice's sake, and Stan spitting on the ground asking if "she" has any money, she decides to try a different approach by "bringing that inner beauty to the outside." However, the final Stan looks worse than the original Stan, and Mabel finally gives up, until Wendy says that Stan is un-fixable, just like the "spinny pie thingy in the diner." Mabel suddenly gets an idea. She marches Stan down to the diner to see Lazy Susan. Susan ends up giving him her number, and Mabel is overjoyed.
When the Mystery Shack hosts a party, Mabel begs Stan to let her mingle with other kids. He eventually relents and gives her job to Dipper. She then meets Grenda and Candy Chiu at the party, who soon become her friends. They tell her about Pacifica Northwest, the most popular girl in Gravity Falls. Pacifica makes fun of Candy and Grenda, so Mabel steps up to compete with her in a competition to see who could "party-hardy," engaging in activities like singing and dancing. Though Mabel initially receives the audience's vote in the form of applause, Pacifica intimidates the party-goers to cheer for her by using an ice-cold glare, and bribes Old Man McGucket. Unlike most of the other guests, who go off to Pacifica's after-party, Candy and Grenda stay at the Shack and have a sleepover with their new friend (it was their idea).
On Pioneer Day, she runs into Pacifica again, where she says Mabel is too silly and not serious. This makes Mabel angry and embarrassed, so she goes with Dipper to find the true founder of Gravity falls, knowing that conspiracies are serious. After going through many "hard" puzzles, Mabel cracks them all using her silliness, like folding the secret map into a hat, looking at a painting upside down, and making a statue pick her nose. After finding the real founder, Quentin Trembley, they also find out that he was once the 8-and-a-half president of America. To their surprise the Sheriff Blubs and Deputy Durland find them and send them, along with Trembley's body, to Washington D.C. On the way there, they free Trembley and find out that he survived by encasing himself in peanut brittle. They free themselves and eventually return to Gravity Falls. Mabel no longer wants to prove Pacifica wrong, but this does not stop Dipper and he tells Pacifica that her ancestor is a fraud. As stated in later episodes, Mabel wants to become President and will have Grenda be her bodyguard.
When the Mystery Fair comes around, Mabel wins a pig at the fair, who she names Waddles. Later on, she and Dipper find a mysterious man from the future with a time travel device. Mabel wants to go back in time to remember her greatest moment in life, adopting Waddles, which she does again and again once they have the device while Dipper keeps on going back to stop Robbie from dating Wendy. Eventually, Mabel helps Dipper succeed, but this leads to Mabel not winning Waddles. They get in a huge fight and end up going through time, to the 1800s, the Jurassic period, the future, the Mystery Shack about 20 years ago, as well as to parts of the previous episodes "Tourist Trapped," "The Legend of the Gobblewonker," and "Headhunters." They finally end up in the timeline where Mabel doesn't have Waddles. She gives up and becomes miserable. Dipper cannot stand to see his sister in such a miserable state, so he gives in and reverses the timeline so she can have Waddles.
Mabel accuses Stan of "ackin' cray-cray," until she finds out he has a fear of heights. A determined Mabel tricks Stan into climbing the water tower with a blindfold in an attempt to help him get over his fear. After Rumble knocks over the tower, she is seen nervously looking down, now having her own fear of heights, while having cured Stan of his own.
One day, Mabel discovers she is taller than Dipper by 1 millimeter (0.03 inches) and believes she will become an "Alpha Twin." She starts teasing him about it, causing Dipper to take a piece of the height-altering crystals he found in the forest and attach it to a flashlight so he can take advantage of its powers. Using it he increases his height, growing just a bit taller than Mabel, and tells an excuse to cover the secret by telling her he had a growth spurt because of puberty. When Mabel finds out about his secret, she fights with him over the crystal flashlight, causing it to fall in Gideon's hands. Gideon shrinks the twins and takes them to his house, but they escape and chase him back to the Shack by using a balloon. However, the twins start arguing about their height, and Gideon captures them again. Inside his pocket, Mabel tells Dipper the only reason she made fun of him was because he always rubbed his victories in her face, and Mabel notices, even when they were tiny, that she conserved her millimeter. The two make up and escape. They immobilize Gideon by tickling him, and Stan kicks him out of the Shack. The twins regrow themselves, and Dipper lets Mabel keep her millimeter.
Upon learning about Gravity Falls' summer version of Halloween, Summerween Mabel and Dipper become very eager to trick-or-treat with Soos, Candy, and Grenda. When the Summerween Trickster threatens to eat the group if they fail to get him 500 pieces of candy, Mabel retains a positive outlook, seeing it as a reason for her brother, who said he was sick to get out of trick-or-treating to attend a party with Wendy. The gang begins to collect treats, and Mabel soon realizes that Dipper putting on his costume would greatly increase the amount of candy received at each house. As Dipper talks to Wendy about the party, Mabel and the others, who had gone to obtain the final piece of candy, overhear the conversation, thereby learning of Dipper's motives, and Mabel felt betrayed and becomes angry with her brother. After the group reaches their deadline for getting the Trickster's treats, the monster comes and, since the group lacked the required candy because of Dipper accidentally dumping it into a stream, attempts to eat them, only to be destroyed when Soos drives through him. The Trickster then reassembles and chases the twins, Soos, Candy, and Grenda into the Summerween Superstore. There, they learn that the Trickster is made of "loser" candy, and Soos eats him. At the Mystery Shack, everyone, including Stan, Wendy, and Waddles, watches movies, eats candy and "celebrates pure evil."
When Mabel becomes fed up with the way her uncle runs the Shack, specifically mistreating his employees, the two make a bet: whoever makes more money (Stan on vacation vs. Mabel as the boss) in three days time is in charge for the remainder of the summer. Using techniques she learns from Succeeding In Management 1983, she encourages her employees to follow their dreams and accepts suggestions from them, much to the others' delight. However, the workers begin to take advantage of her, and things become extremely complicated when a beast (the Gremloblin) she had had Dipper capture escapes from his cage, terrorizes tourists, and damages merchandise, properties of the Mystery Shack, and the building. After he is defeated, Mabel finally snaps, and she bosses around her workers like Stan and makes a large profit in doing so. But, due to various expenses, she is left with a single dollar; nonetheless, meanwhile she still beats Stan in the game show, whose total is nothing. Despite her win, she rejects the opportunity to remain in charge, and she forces Stan to perform the apology dance he agreed to do if he lost.
As she, her family, and Soos are falling down a bottomless pit, she tries to come up with ways to entertain herself and the others. After the group settles on telling stories to pass the time, Dipper proceeds to tell "Voice Over," in which Mabel is seen teasing Dipper about his "squeaky puberty voice," dismissing his more masculine, voice over-quesover-esque tone, and being happy about him deciding upon his original sound. In Soos' story, she is a victim of a sentient pinball game's attempts to kill her, Dipper, and Soos for cheating, and she serves as a distraction as Soos goes to turn off the game and free them. In her own story, "Trooth Ache," she becomes so resentful of Stan's lying habit that she forces him to tell the truth with a set of magical teeth. Though she is excited about Stan's truthfulness at first, Mabel quickly comes to hate her uncle's unfiltered honesty, and even goes to the point of lying to prevent him from being arrested for various crimes to which he admits. After the group exits the pit via the same place they came out, Stan falls back in, but Mabel and the others say that he will be fine and walk away.
On the hottest day of the summer, Mabel meets a merman by the name of Mermando, who is trapped at the Gravity Falls Pool. She is immediately lovestruck by his good looks and mysterious allure and tries hard to get to know him. Upon finding out he's trapped, she devises a plan to free him. The first of which involved building prosthetic legs out of fish sticks, which she abandoned in favor of a less nonsensical idea of smuggling him in the Pool's water cooler and driving to the Lake Gravity Falls with the Mystery Cart. Dipper initially tries to stop her after following her in a high-speed race to the lake but helps her out when he finds out about Mermando. Mermando nearly suffocates without water, but Mabel convinces Dipper to give him "reverse CPR." After he is saved, Mermando gives Mabel her first kiss before saying goodbye. Later, forlorn, Mabel at the pool receives several messages in bottles from him.
When the twins grow extremely regretful about sharing a room, they find another within the Shack. Since both want it, they decide to compete for the key to it, but unexpectedly swap bodies in the process and panic as a result. Mabel, being stuck in Dipper's body began a campaign to make Dipper look bad in front of Stan. Most of this campaign consisted of having fun breaking stuff and proclaiming she was Dipper. Mabel missed out on a sleepover scheduled that very night with Candy and Grenda to Dipper with her body. Mabel spies on the sleepover through a keyhole after being denied entry and Grunkle Stan, discovering this but believing that Mabel is Dipper, decides that Dipper is "at that creepy age where you spy on girls" and decides to tell him (her) about the birds and the bees. After being traumatized by this, Mabel loses the room to Dipper due to giving the impression that Dipper had decided to stand up to Stan. She continues to hide the key to the room from Dipper, however, and locks herself in the room. However, she is tricked into opening the door by Dipper. After this, she swaps bodies multiple times with multiple people, including Waddles, due mostly to conflict over the key to the room. After everybody is back in their own body and they talk it over, Mabel agrees to let Dipper have the room. The two eventually bond over attic mini golf after they decide they miss being in the same room and share a room in the attic again.
Mabel is incredibly excited to go see a concert with her friends Candy and Grenda for a boy-band that they are all obsessed with, Sev'ral Timez. All of them are very eager to see the concert, but when they get there, they find out that it has been sold out. Mabel is still determined to meet the band and sneaks into the backstage room with her friends to see them. They discover that the boy band is made up of clones, who are being held captive in a cage by their cruel producer. Mabel and her friends bust them out and take them to the shack, where they keep them inside because their producer is looking for them. Mabel and her friends teach/attempt to teach the band to behave like normal people, and during this process, Mabel becomes extremely possessive of the band. When she and her friends learn of their producer's arrest, Mabel doesn't want to let the band go and tells them to kick her friends out. Eventually, after the band plays a song that they wrote for her, she comes to her senses and decides that it would be better for the boys if she let them go. She and her friends make up and send the boys off into the woods to be free.
When Mabel decides to get Waddles a present, she reluctantly leaves the pig with Stan. When she returns, she learns that a Pterodactyl has made off with Waddles, after Stan put the pig outside, something she had expressly told him not to do. She then leads the others in getting Waddles back, refusing to even talk to Stan until he saves Waddles from getting eaten, after which she forgives him.
When Gideon sends Bill Cipher into Stan's mind to get the combination to the safe containing the Mystery Shack's deed, Mabel, Dipper, and Soos follow him. They are eventually able to remove the demon, but on returning, they discover that Gideon used dynamite to open the safe instead. With the deed in hand, Gideon forces them all out of the shack, and has his father demolish the sign with a wrecking ball.
Forced to live at Soos' abuelita's house, the Pines watch a television report about Gideon, and his plans to rebuild the Mystery Shack as "Gideonland." They go to the unveiling in an attempt to unmask Gideon to the town, but no-one believes them. Soon after, Stan decides to send Mabel and Dipper back to their parents. Instead, they attempt to break into the Shack, enlisting the help of the Gnomes to do so. However, Gideon turns the Gnomes against them and takes Dipper's book. As the twins are on the bus back home, they see Gideon's Gideon-bot coming after them. They try to stop Gideon, but he takes Mabel for his "queen." Dipper gets inside the robot and fights Gideon, causing the robot to drop over a cliff. Mabel saves herself and Dipper with her grappling hook. Gideon attempts to have the twins arrested, but Stan reveals that Gideon has been spying on everyone, causing Gideon to be the one arrested, and the Mystery Shack deed to be returned to Stan. The Pines family then returns to and repairs the Mystery Shack. After Stan takes 3 from Dipper, Mabel consoles her brother, telling him he doesn't need it to do great things.
In "Scary-oke," Mabel is very excited for the upcoming after-party to celebrate the defeat of Lil' Gideon, mostly because of the "Karaoke Bonanza" Mabel planned. Mabel is looking after the party when she is informed that Dipper has raised the Undead. The twins dart into the Mystery Shack when they are cornered by zombies. They board up the doors and windows with various objects and furniture, but the zombies break through a window despite the twins' best efforts. Once they are slowly being cornered by zombies, Stan appears and begins beating down zombies with a bat, clearing a path for Mabel, Dipper, and Waddles to run upstairs. Stan then joins them soon after. After Dipper discovers certain text of the journals were written with invisible ink, and can be seen under black light, it is revealed that the zombies can have their heads shattered by a "perfect three-part harmony." Mabel then suggests they defeat the zombies by singing karaoke. The trio goes out on top of the roof and begin singing "Taking Over Midnight," much to Stan and Dipper's dismay. The three-part harmony causes the zombie's heads to explode, thus killing them. Once all the zombies are "dead," the three celebrate and go inside a heavily damaged Mystery Shack.
In "Into the Bunker," just before entering the bunker, Mabel accuses Dipper of inviting Wendy because he likes her. Dipper denies this, saying that Wendy is just a friend, but Mabel continues to tease him. Once in the bunker, Mabel discovers the note written by Dipper for Wendy confessing to her that he likes her. Mabel decides to make him confess, and pushes him into a locked room with Wendy, refusing to let them out until he confesses. Once she and Soos realize that they are gone, they go after them and run into them as they are escaping the Shape Shifter. Dipper is suspicious of them being the Shape Shifter, and Mabel "inspects Soos' shape," poking his stomach. Dipper decides that it is definitely them. The gang decides to lure the Shape Shifter to them, so Mabel and Dipper go up to it. The Shape Shifter chases them to Wendy and Soos, who are turning on a powerful hose which shoots the Shape Shifter away and briefly fills the room with water. Once out of the bunker, Mabel spies on Dipper as he confesses his crush to Wendy. She and Soos then go home to have a "hero's breakfast:" syrup on cereal.
In "The Golf War," Mabel and Pacifica compete in mini golf. Mabel and Dipper discover that the golf course is run by the Lilliputtians, who agree to help Mabel win the competition in exchange for a sticker with a picture of a trophy on it. She finds out that the Lilliputtians helping her had rivals with the other Lilliputtians in the course. When Mabel decides that the competition (for the sticker) has gotten too fierce when they try to kill Pacifica, she rips and eats the sticker and makes a speech to them. They miss her point and all the Lilliputtians put aside their differences to try to cut her open to get the sticker. She saves Pacifica and the two fight off some of the Lilliputtians until Dipper arrives with a golf cart where they escape in. Once out, Mabel offers her a ride home when her parents fail to show up.
In "Sock Opera," Mabel gets a crush on Gabe Bensen, and puts on a puppet show to impress him, much to the annoyance of her brother. When she discovers that Bill has stolen Dipper's body, she attacks Bill and fights him until he leaves, destroying her own puppets in the process. Gabe tells Mabel that he hated her show as she had made a mockery of his "art," and leaves. Mabel is dismayed at first, but upon seeing Gabe make out with his puppets, she admits that she "probably dodged a bullet."
In the "Little Gift Shop of Horrors" story, "Clay Day," Mabel is shown to be afraid of claymation when Grunkle Stan puts on a movie called "Believe in Yourself." Stan suggests they all go to the film animator's house to prove that claymation is harmless. When they arrive, they are surprised to see clay figures walking around on their own. When they find Claymore, he explains to them that he used black magic on them to animate themselves but when claymation was out and computer animation was in, the clay figures went crazy. With Stan, Soos, Dipper, and Claymore captured, Mabel hides. She finally concludes that they are only clay and grows the courage the face them. Being able to one mold them into something of her use, she uses the newly formed clay figure to defeat the other clay figures. Though she didn't get rid of her fear and exclaims she may be even more scared now, she says its just a rational fear.
In "Society of the Blind Eye," Mabel finds out Mermando is getting married to the Queen of the Manatees and she was ultimately bummed about all her past failed relationships. She later finds a clue on the broken laptop which she and Dipper figure out that Old Man McGucket might be the author. Then Soos and Wendy tag along with the twins to confront him. However, McGucket claims he has no memory since 1982. After McGucket spots a strange symbol in a page in the book, he freaks out and expresses how the symbol belongs to a mysterious group who did something to him. Seeing how the earliest thing McGucket remembered involved the History Museum, they went there with McGucket. Despite losing track of the suspicious person inside, they find a secret passage. Being unnoticed, they watched as Lazy Susan's memories were zapped away by the Blind Eye Society. When the coast is clear, she and Wendy are placed on the lookout, while the boys searched for answers. Mabel then talks to Wendy about her boy trouble and was even willing to erase her memories of them, until they were captured. Now caught, the society members tried to erase their memories but McGucket saves them. Eventually, she and the gang are able to defeat the society members and erase their memories. With a lesson she saw from McGucket she decides to keep her memories even with the opportunity. When Blind Ivan couldn't remember his name, Mabel made up "Toot-toot McBumbersnazzle" for him, telling him he was a "traveling banjo minstrel."
In "Blendin's Game," after finding out that it was Soos' birthday, she, Dipper, Candy and Grenda throw him a surprise birthday party. However, they don't get the reaction they were hoping for and Soos goes away depressed. Wendy then tells them how Soos dislikes his birthday though she doesn't know why. So instead of trying to bring up anything to do with a birthday, they bring Soos to his favorite place, Big Gunz Laser Tag.
While running to the laser tag arena, they suddenly slip into a completely white room through a portal. They then meet Lolph and Dundgren of the Time Paradox Avoidance Enforcement Squadron. Surprisingly enough Blendin appears before the twins too, stating that he challenges them to Globnar, where he hopes to win the time wish to rid of their existence. Mabel uses a distraction idea giving Dipper the chance to steal the time measuring tape and the two accidentally go ten years back to the past with the time measuring tape breaking. While trying to avoid the enemies tracking them, they head to the Mystery Shack where they meet 12-year-old Soos. Following him to his birthday party, they find out Soos dislikes his birthday so much because it is a constant reminder of his father's neglect and abandonment.
They willingly let themselves be caught in order to win the time wish and give Soos his deepest desire. After many challenges in the game, she and Dipper come out on top and let Blendin go free because they felt guilty for getting him in trouble. Going back to the present, they tell Soos about where they've been and gives him the time wish. Ultimately, Soos doesn't use the wish for his father and gets over him, using the wish to fix up Dipper and Mabel and a slice of infinite pizza, and embraces Dipper and her as his true family.
In "The Love God," Mabel, seeing how depressed Robbie is following his break-up with Wendy, decides to play matchmaker and set Robbie up with a new girl. After much thinking, she sets him up with Tambry but the date does not go very well. She then witnesses the power of the Love God, and steals a love potion from him, adding it to Robbie and Tambry's chili fries. However, the pairing breaks up Wendy's friends, and Mabel is forced to try and undo it. She and Dipper try to steal an antidote from the Love God's van. The Love God catches them in the act and chases them. The Love God ends up having Stan and Soos' hot-air balloon crash on to him. He then angrily tells Mabel to keep the antidote. Ultimately, Mabel chooses not to use it, since Robbie and Tambry are so happy together.
In "Northwest Mansion Mystery," Mabel, Candy, and Grenda watch a report on the upcoming Northwest Fest with awe. When Pacifica comes to the Shack asking Dipper for help, Mabel convinces Dipper to do so, in exchange for tickets for her and her friends. Once they get to the party, Mabel and her friends enjoy the fancy things on offer. Shortly after, Marius von Fundshauser catches their eyes. Though the three agree at first not to try and date Marius, Mabel and Candy decide to flirt with him, but leave Grenda out, due to her aggressive style of flirting. Mabel gets confused that he's Australian because he's Austrian. Mabel and Candy's attempts to attract Marius leads to them fighting amongst themselves. Grenda finds out they had left her out and flirts with Marius out of spite. When the Ghost of Northwest Manor turns the guests into wood, Mabel and her friends are shown to have been arguing at the time. After the ghost departs, they reconcile, and Mabel and Candy support Grenda when Marius shows interest in her. When Candy calls "bridesmaid," Mabel calls "co-bridesmaid."
In "Not What He Seems," Mabel and Dipper have their fun day with Stan interrupted when the government arrests Stan for stealing toxic waste. While being taken to child services, the twins hatch a scheme to prove their great uncle's innocence; going back to the Mystery Shack and finding surveillance tapes. Mabel uses her trusty grappling hook to sneak in. When they enter Stan's office, Mabel mentions checking the "antel-rabbit," and it is there that the surveillance tapes are found. At first, it appears that Stan is innocent, but then the video shows him entering the Shack with a barrel full of waste. Mabel soon stumbles upon Stan's box of fake IDs from all over the country and news clippings that say Stan isn't Stan.
The twins find the code to Stan's secret laboratory behind the vending machine, and after a quick scuffle with Soos, they finally enter. Mabel still has reason to believe Stan until Dipper finds the Journals. The three try to shut down the portal until Stan bursts into the lab, begging them not to. After yet another anomaly, Mabel is faced with an extremely difficult choice; to shut down the portal and potentially stopping a world-ending catastrophe, or to believe Stan and leave the portal alone. Mabel's trust in Stan convinces her not to shut it down, leaving Dipper outraged. After the explosion, the Author walks through the portal, with Stan revealing him to be his brother. Mabel asks if this is the part when someone faints; Soos replies that he will, and then faints.
In "A Tale of Two Stans," she introduces herself to Ford and listens to his and Stan's story about their past. She and Dipper later watch as Ford erases the memories of the government agents, and eavesdrops on Stan and Ford's discussion. As they prepare for bed, Mabel shares her worries with Dipper that they might end up having a dysfunctional relationship like Stan and Ford - or, in her words, 'being stupid'. Despite Dipper playfully reassuring her otherwise, she still looks worried after the lights go out.
In "Dungeons, Dungeons, and More Dungeons," Dipper asks Mabel to play his new game with her, but she refuses. She, Grenda, and Stan are all geared up to watch the season finale of Duck-tective, but they find that Dipper and Ford's game has taken over the entire room. After Probabilitor the Annoying is released by Stan and Ford and Dipper are captured, Mabel and the others set out to rescue them. After defeating a troll, they reach the wizard, who challenges them to a game of Dungeons, Dungeons, and More Dungeons. Mabel uses her imagination to create cool weapons and summons for Ford and Dipper. Thanks to her imagination and Stan's "luck," they succeed and send Probabilitor back to his own dimension. Afterwards, they all watch the second airing of the Duck-tective season finale.
In "The Last Mabelcorn," Mabel takes on the task of obtaining unicorn hair to protect the Mystery Shack. Along with Wendy, Candy, and Grenda, she meets Celestabellebethabelle. The unicorn informs Mabel that she is not pure of heart, therefore not allowing her to take unicorn hair. A distraught Mabel decides to go around town doing good deeds. Unfortunately, Celestabellebethabelle still deems her unworthy of getting unicorn hair. While Mabel tries to think of more ways to purify her heart, the other girls take matters into their own hands and decide to cut the unicorn's hair while she is knocked out by fairy dust. Mabel attempts to stop them, taking Wendy's scissors away from her, when Celestabellebethabelle wakes up and, seeing Mabel with the scissors, assumes the worst and decrees that Mabel will never be pure of heart.
Suddenly, two other unicorns emerge from the forest and inform the girls that the "pure of heart" requirement was just an excuse to keep humans away from them. Mabel angrily punches Celestabellebethabelle, and a fight ensues. Later, the girls return to Shack with a lock of hair and a treasure chest given to them by the unicorns as a bribe to leave them alone.
In "Roadside Attraction," Mabel joins Stan, Soos, Candy, and Grenda in pulling pranks on various tourist traps across Oregon. After preparing Dipper's things, Mabel sees Dipper's collection of Wendy photos and realizes her brother still hasn't gotten over his crush on Wendy and tells him to move on and Dipper joins them on the trip. In their first stop at Granny Sweetkin's Yarnball, Mabel and her friends jump straight into the giant yarn ball and Mabel grabs a part of the yarn. After Dipper ties the yarn, the group heads to their RV and proceeds to drive away, pulling the yarn away and untangling the ball. At their next stop, Mabel and the others go into the Upside Down Town. After Dipper's success at getting a girl's contact info, Mabel sees her brother excited.
After pulling more pranks on other places, the group eventually camp for the night, Mabel and her friends play a Truth or Dare or Don't game. During their game, Candy admits to having a crush on Dipper, Mabel and Grenda proceed to help their friend get close to Dipper during the rest of their road trip. When they reach the final tourist trap, Mabel and Grenda proceed to keep an eye on Candy and Dipper during their date. After the date between Candy and Dipper goes awry, Mabel and Grenda proceed to console their friend. Dipper arrives and asks for the girl's help and they all turn against him, however, Dipper tells them they can kill him later as Stan is in trouble and the group proceeds to help Stan. After helping Stan escape from Darlene, the group proceeds to flee the tourist trap. As they head back to Gravity Falls, they all witness the Mystery Shack being vandalized by the owners of the tourist traps they pulled pranks on.
During "Dipper and Mabel vs. the Future," Mabel wakes Dipper up, excited about the upcoming week as it is their birthday. She and Dipper become even more excited as they realise they will finally become teenagers, and Stan and Soos join in on the excitement. Mabel decides to have the greatest birthday party before summer ends and they proceed with the preparations, however, when Stan decides against having a party in the Mystery Shack due to their previous party incident, Soos suggests the Gravity Falls High School gym as an alternative. During their conversation, Ford calls for Dipper. Mabel overhears the two and tells Dipper to join Ford on their mission, giving her support to Dipper as well as giving him a walkie-talkie so they can talk to each other.
Mabel and Soos go to Gravity Falls High School but the school gym is filled with teens doing high school registration. They meet Wendy there and Mabel asks Wendy about her high school experience. As Wendy describes her bad high school experience, Mabel is discouraged and tries to tell Dipper but they get cut off. Soos tells Mabel to send an invite to her friends to cheer her up and she proceeds to do so however after arriving at Grenda's, her friends tell her they couldn't come to her party due to not being in the town (Grenda is on a cruise with Marius and Candy must go to music camp). Mabel eventually returns back to the Shack, deeply saddened. As she reminisces her summer, Stan comes to cheer her up, telling Mabel that while summer is coming to an end, Dipper is still there for her and Mabel feels better.
However, Mabel overhears Dipper in the walkie-talkie accepting Ford's apprenticeship offer and she begins to see her fears come true. When Dipper arrives, Mabel shows her distress over Dipper becoming Ford's apprentice and runs away after Dipper tells her he wishes to stay, because she believed that even when no one else was there for her, Dipper would be a constant. In the forest, Mabel tries to cheer herself up but realizes she took Dipper's bag. Blendin Blandin approaches her and offers Mabel a way to halt time so summer wouldn't end. Blendin asks Mabel for the Rift in exchange, with Mabel not knowing what it truly is. Mabel gives it to Blendin but Blendin destroys it as soon as it's handed to him. Blendin starts laughing maniacally and reveals he was being possessed by Bill Cipher. Mabel is shocked by what she had done, but she was instantly put to sleep by Bill and Bill emerges from Blandin's body as Mabel laid unconscious on the ground.
In "Weirdmageddon Part 1," Mabel is encased inside a pink prison bubble by Bill and taken to the floating cliffs in Gravity Falls. Dipper, Wendy, and Soos eventually reach the bubble and go inside to find Mabel.
In "Weirdmageddon 2: Escape From Reality," Dipper, Wendy, and Soos find her in her bubble sleeping in a tower guarded by giant waffles with knives. The group raids the tower to save Mabel but when Mabel wakes up, she reveals that she created the place called Mabeland, and she does not wish to leave.
Dipper attempts to persuade Mabel to leave her imaginary world but Mabel instead shows she created a more supportive brother, Dippy Fresh, in replacement of Dipper and prefers to stay. When Wendy and Soos get distracted due to wishing for what they desire, Dipper leaves Mabel's tower and contemplates the situation.
When Dipper is arrested for mentioning reality, Mabel saves him from banishment but Dipper is tried in court for Fantasy vs. Reality. Xyler and Craz present Mabel's case, showing Dipper and Mabel's unfortunate events through their years but Dipper counter argues that Mabel simply wanted to escape reality because she didn't want to grow up. Dipper shows that even through their tough times, they were there to support each other all the way through and Mabel accepts the truth, giving Dipper a 'sincere' sibling hug. When they pat each other, the creatures of Mabeland turn against them but the twins, Wendy, Soos, as well as Xyler and Craz, escape from the bubble. Mabel apologizes to Dipper and tells him if he can be Ford's apprentice if he wants but Dipper instead tells Mabel he will go with her since he doesn't want to miss their awkward teenage years.
The group returns to the Mystery Shack after seeing the town deserted. The group proceeds to raid the shack after hearing noises only to be met by Stan and his resistance group who are taking refuge inside the Mystery Shack.
In "Weirdmageddon 3: Take Back The Falls" Dipper and Mabel reunite with Stan at the Mystery Shack along with most of the town's survivors. The twins rally the survivors into fighting back against Bill and help McGucket build the Shacktron to help them do so. On the night before the battle, Mabel gave all the survivors her sweaters to keep them warm and then defused an argument between Dipper and Stan over Stan's reluctance to save Ford.
Mabel helped pilot the Shacktron during the fight with Bill's hench maniacs and is part of the rescue party sent in to save Ford and the townsfolk captured by Bill. Gideon tells her how to revert the townsfolk stuck in the throne to normal and they are all saved. Ford explains that the other way to defeat Bill is the Zodiac which needs 10 people to hold hands to destroy Bill. Mabel represented the Shooting Star and the Wheel is almost successful until Stan and Ford break into an argument Bill returns from destroying the Shacktron.
Bill turns everybody but the Pines family into tapestries and threatens Dipper and Mabel's lives unless Ford tells him how to get rid of the barrier that's preventing him from leaving the town. When Bill tries to threaten Mabel, she puts spray paint in his eye to distract him as she and Dipper attempt to escape while Bill furiously chases after them. When the twins reach a dead end, Mabel grows her hand using Dipper's flashlight in order to break the wall. However, they stop to see that everybody in the Shacktron has been captured by Bill's hench maniacs and Bill manages to capture them.
Bill is on the verge of killing one of the twins (assumed to be Mabel herself because his eye stopped on the shooting star image and he was about to snap his fingers), when Ford says he will allow Bill into his mind in exchange for letting his family go. Bill accepts and enters Ford's mind. However, Bill gets tricked as he actually entered Stan's mind in the brothers' plan to destroy Bill once and for all by having Ford shoot Stan with the memory erasing gun which would wipe away Bill from existence while he was trapped in Stan's mind. The plan works and the town returns to normal.
Mabel becomes distraught as she learns Stan sacrificed his memory to save everybody and breaks down in tears. When they return Stan to the Mystery Shack, he still doesn't remember anything, but Mabel refuses to believe that her Grunkle is gone for good. She shows him her scrapbook of their summer together in order to jog his memory. It appears to be fruitless until Waddles jumps on Stan and he remembers his name, and begins to gradually regain his memory. Mabel keeps reading her scrapbook and Stan eventually managed to fully recover his memory after a week of 'intensive scrapbook therapy' and reading from 1001 Yuk 'Em Ups, his joke book.
Mabel and Dipper celebrate their 13th birthday with the town and Mabel wishes that she could shrink the town's residents in order to take them home with her, but as it was probably impossible settles for everybody signing her scrapbook and destroys the Memory Erasing Gun so that there'd be no way she could forget anything.
On the day of the twins' departure, Mabel says goodbye to Candy and Grenda and Stan wears the sweater she knitted for him that day. As the bus arrives, Mabel is forced to say goodbye to Waddles since her parents won't let her bring a pig home with her. However, Waddles doesn't want to leave Mabel much to Mabel's anguish. Not being able to stand seeing Mabel so upset, Stan says that if he had to put up with Waddles all summer, their parents could put up with him until the next summer. When the bus driver tries to protest Waddles coming on the bus, Stan and Ford flash their weapons at him, convincing him to let Waddles on. Stan tries to hide his emotions claiming he's glad to be rid of the kids, but they immediately see through it and Mabel says "We'll miss you too Grunkle Stan." They board the bus and wave goodbye to their friends and family as the bus drives away.
Mabel Pines is an optimistic, fun, and energetic girl full of spirit. She is an optimist who skips through life with a braces-filled smile and an assortment of extremely colorful knit sweaters. It is her outgoing personality and fearless curiosity that comes in handy when Dipper needs help solving a mystery, even if she isn't always aware of her silliness. Despite her cheerful attitude and ability to be able to look on the bright side, she can occasionally get her feelings hurt, especially by her rival, Pacifica Northwest. Mabel avoids lying and is a terrible liar, often blurting out whatever it is about which she is trying to lie. She is a preteen dreamer with a world filled with preteen novels (mostly about vampires), and her fixation on finding her one true love occasionally lands her in sticky situations which ultimately require her brother's help. Still, despite all the weirdness in Gravity Falls, Mabel is always a "glass-half-full" kind of girl. She is rarely angry or upset, and generally keeps a positive outlook. She is somewhat naive at times. Mabel is aware of her charm and cherishes her cuteness and beauty. However, she has a selfish side, particularly when it comes to boys with whom she's infatuated, even breaking promises made with friends in pursuit of her crush, as shown in "Sock Opera." She has also shown to be self-righteous in her decisions, which can be far from justified, or they may accidentally backfire in some way, such as shoving her brother in a closet with Wendy in "Into the Bunker" so that he could end his anxiety and admit his crush on Wendy. This unintentionally endangers them when they encounter a dangerous creature. Her self-righteous nature also caused Wendy's and Dipper's friend group to temporarily break up after she had made Robbie and Tambry date each other in "The Love God." However, like her brother, she has the best of intentions and she will always try to choose the right options for the happiness of herself and others.
- For a complete list of Mabel's sweaters, see the list of Mabel's sweaters.
She is a short 13-year old girl, exactly one millimeter taller than her twin brother. She has round blushing cheeks, long brown hair that reaches her hips and curls towards the bottom, and her eyes are the same brown as Dipper's. She has silver-coloured braces. Mabel's apparel varies for each episode, more so than any other character's, with at least one new outfit usually consisting of a sweater, undershirt, skirt, headband, black ballerina flats, white anklet socks, and occasionally earrings, though she does deviate from this look occasionally.
Her signature outfit is a short-sleeved pink undershirt underneath a slightly darker fuschia sweater with a shooting star, accompanied by a purple, teal and orange-striped tail falling toward the left, a matching fuschia headband, a loose purple pencil skirt, coupled with black black ballerina flats and white socks.
When playing mini-golf, Mabel wears a pink polo shirt with a purple skirt.
For her nightwear, she has a purple long-sleeve shirtdress with a floppy disk in the middle, matching purple headband, and dark pink socks.
Her swimsuit is a red one-piece swimsuit with a red star in the middle, and as well as a matching red headband.
Mabel is very close with her brother, saying he's the "best brother in the world (though he could stand to shower more)" and the two enjoy spending time together, whether it's simply goofing off or having adventures in their strange summer home. They care deeply about each other and are easily willing to risk their lives for the sake of the other. Although they do sometimes bicker with each other, as siblings usually do. They can also get on each other's nerves at times, more frequently Mabel on Dipper's, due to teasing him. Mabel cannot stand to see people bully Dipper, nor does Dipper like to see his sister upset, and he is somewhat protective over her..
In "Not What He Seems," Dipper's relations with Mabel is put to a test when she ignores his requests to press the red button. After Dipper lands on the floor when Stan's machine is activated, a picture of the two is seen when the glass framing gets broken, which might foreshadow a future obstacle in their relationship, but in "A Tale of Two Stans," while Dipper held no grudge towards her for trusting Stan, Mabel is left unsettled about their future relationship due to Stan and Ford's dysfunctional relationship.
In "Dungeons, Dungeons, and More Dungeons," Mabel's fear of them developing a dysfunctional relationship is highlighted when Dipper pointed out her and Stan's mockery of him, which leaves her guilty of her past actions. She also seemed a little upset that Dipper was spending a lot of his time with Ford, as he used to spend more time with her. She deeply feared Dipper being harmed by Probabilitor and is the first to say that they have to save Ford and Dipper despite Grenda and Stan's reluctance to do so.
In "Dipper and Mabel vs. the Future" Mabel overhears Ford offer to make Dipper his apprentice, and is so horrified at the thought of Dipper and her being apart that she runs off crying into the forest. She does not wish to see summer end and have to leave Gravity Falls, leading to her handing the rift to Blendin.
In "Weirdmageddon 2: Escape from Reality," when Dipper is trying to convince her to leave her perfect prison bubble, she and Dipper reconcile after he tells her that he won't take Ford's apprenticeship, and will always be there for her.
In "Gravity Falls: Don't Color This Book! It's Cursed!," a black light note in "Gravity Falls: Journal 3," and "Gravity Falls: Legend of the Gnome Gemulets," Mabel has made it clear that she's aware of Dipper's newfound friendship with Pacifica and she frequently teases Dipper and Pacifica about their hug in "Northwest Mansion Mystery". She's also shown to a have an interest in making the two a couple since she writes "Roses are red, Pacifica's blood is blue, I read what you crossed out, I'm onto you! Start combing your hair, brother!".
"Grunkle Stan... I trust you."
While Mabel is an incredibly cheerful optimist, Stan is something of a sneaky miser, so their personalities sometimes clash. Despite Mabel's disapproval of many of Stan's habits and Stan's irresponsibility and exploitation of Mabel, they still love each other. Mabel often gets involved in her great uncle's problems, offering him help whether he wants it or not. Additionally, Stan occasionally gets protective of Mabel and becomes jealous when she declines to spend time with him. It's also been demonstrated that he shares and enjoys her sometimes sharp sense of humor and surprising bursts of cunning. Mabel also shows that she trusts him despite the lies he has told, showing that despite everything, she loves him very much.
Soos and Mabel are close friends, even having a secret handshake and nicknames for each other. Soos often serves as a sidekick for Mabel and Dipper on many of their adventures, and he frequently offers them guidance, though they do not always listen. Mabel and Soos share a mutual love of humor and optimism, which aids in their closeness and their tendencies to goof off together.
She also helped Soos with relationships and even risked her life and existence in Globnar just to ensure that Soos reunites with his father but is considered family by Soos. She was reluctant to cause harm to Soos in "Not What He Seems."
Mabel and Wendy enjoy hanging out and goofing off together and Mabel will sometimes seek romantic advice from Wendy. Wendy enjoys Mabel's energy and directness and supports her despite how overwhelming Mabel can sometimes be. Knowing of Dipper's crush on Wendy, Mabel sometimes gets entangled in her brother's attempts to get Wendy to return his feelings.
Gideon seeks revenge on Mabel and her family (which he sees as the only thing separating him from Mabel), nonetheless retaining a crush on her. So, as he enacts his evil schemes, he forcefully attempts to get her to like him back, and he sends her love letters on the side. Unfortunately for him, Mabel is not interested whatsoever, finding him to be creepy and unlikable. She also hates the fact that he tries to harm her family. On multiple occasions, Gideon tries to convince Mabel to be his queen.
Mabel cares about her pet pig deeply, even calling him her "soulmate" and considering the moment she won him to be the best in her life. She frequently dresses him up and spends time with him, and Waddles seems to like Mabel's company just the same. When Pacifica won Waddles in an alternate timeline, she cried and wanted Dipper to go back in time to get Waddles back, falling into a deep depression when he refused. Mabel was mad at Grunkle Stan when he lied about leaving the Waddles outside, but forgave Stan after he saved him.
Candy Chiu and Grenda
With all of them being labeled "weird" by more popular individuals, Mabel, Candy, and Grenda are brought together by this. Despite doubts from others, they share typical interests for girls their age, such as boys, makeup, and romance. It is safe to say that they spend time together on a daily basis, engaging in various activities, most commonly sleepovers. In Carpet Diem, Dipper dislikes how Mabel is always hanging out with her best friends too much.
In her spoiled, stuck-up nature, Pacifica views Mabel as an outcast because of her extreme silliness and choice to hang out among the "weird" crowd. Pacifica frequently teases Mabel about her personality and practically everything she does, thus increasing tensions to the point of being archenemies. Mabel's feelings can be hurt by Pacifica's words and she will often stand right back up to the girl, adding to their animosity. In "The Golf War," Mabel decided that, after the Lilliputtians tried to kill Pacifica, rivalries are dumb and seemed to want to get over the one she had with Pacifica, trying to be friendly and making some progress in this. They become allies in the end of the series.
Mabel's relationship with her parents is obscure, especially due to showing little reaction in the few instances of direct interaction between the parties. However, it is known that Mabel enjoys her life in Gravity Falls. Mabel is also seen writing her parents a letter and attempting to send her mom a video of her sticking gummy worms up her nose.
Though Mabel has had relatively little interaction with Ford, she has been shown to like having him around. Ford feels the same way and even trusted her enough to get the unicorn hair for his attempt to keep Bill out of the Mystery Shack. When Mabel succeeded in the mission, Ford congratulated her, calling her a "good person," which was exactly what she wanted to hear. Upon Ford's first meeting with Mabel, he says that he "liked [her], she's weird".
Despite Mabel initially giving Ford the benefit of the doubt, she doesn't have the same, loving relationship with him as she does with Stan. There is friction in Mabel's feelings towards Ford, but Mabel has thus far managed to hide it.
Mabel also has a "solo page" written by Ford, too. Like all the others, there's invisible ink on the page, and when revealed in the backlight, it says, "Her heart is pure" and in the bottom, "She can save the world."
Mabel claims to be an arts and crafts master, which is supported by the skills she's shown so far. These include knitting (as she knits her own sweaters), scrap booking (having made multiple scrap books, stating that she never misses a "scrapbookortunity"), sewing, bejeweling (seen in "The Hand That Rocks the Mabel"), wood carving (having a collection of painted wooden figurines in "The Love God"), wax sculpting (having made a realistic wax figure of Grunkle Stan in an extremely short amount of time in "Headhunters) and origami (as seen in "Irrational Treasure" when she made a hat out of a map in a few seconds). She can pick locks with hairpins, as seen in "The Deep End" and "Boyz Crazy." As confirmed in "The Golf War," Mabel is a skilled miniature golfer. In her Guide to Fashion, Mabel is revealed to be a great makeup artist.
- Intro: "Gravity Falls Main Title Theme"
- Every episode of Season 1
- 1. "Candy Monster"
- 2. "Stan's Tattoo"
- 3. "Mailbox"
- 4. "Lefty"
- 5. "Tooth"
- 6. "The Hide-Behind"
- 7. "Mabel's Guide to Dating"
- 8. "Mabel's Guide to Stickers"
- 9. "Mabel's Guide to Fashion"
- 10. "Mabel's Guide to Color"
- 11. "Mabel's Guide to Art"
- 13. "Fixin' It with Soos: Cuckoo Clock"
- 14. "TV Shorts 1"
- 16. "Mabel's Scrapbook: Heist Movie"
- 17. "Mabel's Scrapbook: Petting Zoo"
- 201. "Scary-oke"
- 202. "Into the Bunker"
- 203. "The Golf War"
- 204. "Sock Opera"
- 205. "Soos and the Real Girl"
- 206. "Little Gift Shop of Horrors"
- 207. "Society of the Blind Eye"
- 208. "Blendin's Game"
- 209. "The Love God"
- 210. "Northwest Mansion Mystery"
- 211. "Not What He Seems"
- 212. "A Tale of Two Stans"
- 213. "Dungeons, Dungeons, and More Dungeons"
- 214. "The Stanchurian Candidate"
- 215. "The Last Mabelcorn"
- 216. "Roadside Attraction"
- 217. "Dipper and Mabel vs. the Future"
- 218. "Weirdmageddon Part 1" (no lines)
- 219. "Weirdmageddon 2: Escape From Reality"
- 220. "Weirdmageddon 3: Take Back The Falls"
- Every game
"Check it out Dipper, I successfully bezazzled my face! Blink! Ow..."
"The future, is in the past. Onwards, Aoshima!"
"I'm legalizing everything!"
"I'll be there with you, brother. Whatever happens, I'll be right here, supporting you every step of the–OH MY GOSH A PIG!!!!!"
"Braces! Braces caught in the screen door! Someone dictate my will. I'm giving it all to Waddles."
"Hi, I'm Mabel! I'm twelve and own a pig! Wanna get married?"
"I AM THE GOD OF DESTRUCTION!"
- Mabel is based on Alex Hirsch's twin sister, Ariel Hirsch, who often wore very silly, vibrant, goofy sweaters, so Alex Hirsch made sure Mabel had a different sweater in every episode. Ariel also was a huge fangirl, explaining where that part of Mabel's personality comes from.
- Mabel was originally conceived to have headgear.
- Mabel has been to the county jail with Dipper and Stan for making counterfeit money.
- Mabel is 5 minutes older than her brother Dipper, she brings it from time to time to infuse her status as an older twin.
- Mabel is exactly one millimeter taller than Dipper.
- In the episode "The Deep End," Mabel claims that she has encountered a couple of vampires.
- Mabel shows a sophisticated attitude when it comes to art.
- Dipper and Mabel's middle names are their parents' first names.
- Mabel went to the hospital once for eating scratch and sniff stickers.
- Mabel is secretly envious that her brother is better academically than she is (in contrast to Dipper, who is jealous of Mabel's social skills).
- Mabel once fed baby birds with her mouth.
- Mabel used to have a crush on "the guy from the 10-dollar bill," Alexander Hamilton.
- In the Subway Kids Bags commercial, she is not voiced by Kristen Schaal for unknown reasons.
- Whenever Mabel has nightmares, she meows herself back to sleep.
- Mabel is represented by the shooting star in the Zodiac.
- Mabel was made an official US Congresswoman by Quentin Trembley. However, Washington D.C. refuses to acknowledge her as one.
- According to Alex Hirsch, Mabel is the most underrated character in the series.
- Mabel's first word, according to her, was "unicorn."
- Mabel has been banned from a petting zoo for taping a traffic cone to a horse's head.
- Mabel became pen pals with a pizza delivery man in the 60 seconds he was at the door.
- Mabel and Dipper have allergies that act up around the same time.
- Mabel and Dipper went to Eggbert Elementary.
- Mabel and Dipper are the only characters to appear in every episode of the series. Mabel is the only character to appear in every episode but not have a speaking role in every episode ("Weirdmageddon Part 1" is the only episode in which she has no lines).
- After the events of "Gideon Rises," wherein Mabel uses the grappling hook to save herself and Dipper, she keeps it with her at all times. If Mabel is on screen and the grappling hook can't be seen, it's because she's hiding it in her sweater.
- Alex Hirsch said at the 2014 Comic Con that Dipper and Mabel collect the items that they discover on their adventures.
- In "Mabel's Scrapbook: Petting Zoo," she says that Dipper and herself once won a dogsled race against a space lizard.
- She has accidentally spray-painted her eyes multiple times.
- According to Kristen Schaal, Mabel wants to become the president of the United States. She would have Waddles as her vice president, Dipper as her secretary of state, and Stan would be her secretary of defense.
- Mabel has watched the anime movie "The Cranky Girl Who Did Chores in Sprit Town" 82 times.
- During the "ULTIMATE CROSSOVER FUNDRAISER!" charity livestream, where Alex Hirsch, Dana Terrace, Rebecca Sugar, and Ian Jones-Quartey drew and sang for The Trevor Project, when asked what Dipper, and Mabel would be as Gems, they answered the following (and then did Stan's too):
- Mabel - Cherry Tugtupite. On her chest, where her heart would be.
- Dipper - Larimar. On his head, possibly in the shape of his birthmark.
- Stan - Pyrite (also known as fool's gold). Mirrored to Stan's tattoo on his back, which indicates vulnerability. This was actually suggested by the chat, which was wholeheartedly agreed upon by Hirsch and the others.
- In Rick and Morty's episode "The Rickshank Rickdemption" there is a Gravity Falls easter egg. In the Citadel of Ricks, two Morty's bear a striking resemblance to Mabel and Dipper. The Mabel-looking Morty appears again as Girl Morty in the mobile Pokemon parody video game Pocket Mortys. Her in-game description says "this Morty is the twin sister of Morty wearing a baseball cap. She can often be seen standing in the background making references to other shows." This Mabel-looking Morty made a cameo appearance in the Gravity Falls comic Gravity Falls: Lost Legends.
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