Lee first appears in "The Inconveniencing," going to the abandoned Dusk 2 Dawn convenience store along with Wendy and her other friends. When they jump the fence, Lee grabs Dipper and throws him off after he and the other teens grow tired of waiting for Dipper to climb down. When Dipper manages to open the door to the convenience store, Lee praises him along with the rest of Wendy's friends. In the store, he is seen dumping ice into Thompson's pants with Nate and Robbie.
Later, he annoys the ghosts by sarcastically saying "Yeah right, I'm sure the ghost just wants to talk about his feelings." and ends up on a cereal box labeled "Lee's" with a toucan saying, "I'm bonkers for eating you alive!". He is the third person to be captured by the ghosts in the episode. At the end, he, like all the rest of Wendy's friends, comes back unharmed. The last thing he does is high-five Nate when he hears the fake story of what Dipper did to the ghosts.
He and Nate go to the "Party at the Mystery Shack" in "Double Dipper." When they decide to leave, they are denied as they only have $13, while the exit fee is $15, which meant they were trapped. Later however, they did get out.
In "Mabel's Scrapbook: Heist Movie," he is sleeping at the front desk of the The Royal Ragtime Theatre when the Pines family and Soos walk in. Also, he and Nate chase Stan out of the theater when they are trying to sneak in.
In "Society of the Blind Eye," he spraypaints the words "McSuck It" on the side of Old Man McGucket's home while Nate watches. When McGucket comes out and catches them, Lee high-fives Nate, and they run away.
In "The Love God," he hangs out at the Gravity Falls Cemetery with Dipper, Mabel, and the gang. He and Nate make Thompson lick a sponge. When Mabel later reveals to the group that Robbie and Tambry are dating, Nate gets angry, saying that Robbie knew he liked Tambry. This makes Lee get angry at Nate for not telling him. The group temporarily split up, but reconcile at the Woodstick festival, when they see Thompson running from a security guard after bringing outside food to the event.
In "The Stanchurian Candidate," he is at the grocery store behind Stan when he is buying light bulbs. He is also seen at the town meeting to discuss the new mayor, and is in the crowd throwing bird seed during the Friday debate.
In "Weirdmageddon Part 1," he is mentioned by Wendy when she explains to Dipper that, during the events of Weirdmageddon, Bill's forces manages to capture Lee along with Nate, Tambry, and Thompson during a game of Truth or Dare at the Gravity Falls Cemetery.
In "Weirdmageddon 3: Take Back The Falls," he is with the other teenagers during the activation of the Zodiac in the Fearamid. He's later seen in the epilogue of the series, after Gravity Falls has been returned to normal.
Lee is basically a stereotypical teenager. He enjoys hanging out and goofing off with friends, particularly Nate, doing things like playing games, partaking in dares, and partying. He is sarcastic and likes to tease people, and he dislikes it when others try to stop him from what he views as having fun, often disregarding their warnings. He can be disrespectful of others and their property, and he is frightened in any event of being trapped.
Lee is tall, with a long ovular head, and long blonde hair. He wears a red shirt with an orange thumbs up symbol on it, black shorts, and black and white converses. He has pale skin, a somewhat large chin, and a long nose.
- 105. "The Inconveniencing"
- 106. "Dipper vs. Manliness" (no lines)
- 107. "Double Dipper"
- 109. "The Time Traveler's Pig" (no lines)
- 113. "Boss Mabel" (no lines)
- 120. "Gideon Rises" (no lines)
- 201. "Scary-oke" (no lines)
- 207. "Society of the Blind Eye"
- 209. "The Love God"
- 214. "The Stanchurian Candidate"
- 215. "The Last Mabelcorn" (pictured)
- 217. "Dipper and Mabel vs. the Future" (no lines)
- 218. "Weirdmageddon Part 1" (mentioned)
- 219. "Weirdmageddon 2: Escape From Reality"
- 220. "Weirdmageddon 3: Take Back The Falls"
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