Leaf Man is a character who first appears in "Wizards Only, Fools." He is apparently a wizard. In "Thanks for the Crabapples, Giuseppe," he rides the bus to Big Butt Rock with Ice King, Abracadaniel, Ron James, the Ancient Sleeping Magi of Life Giving, Little Dude, Beau, Giuseppe, and later some Water Nymphs. He is referred to as "Leaf Wizard" in the episode storyboard. He also appears in the comic series "Adventure Time: Ice King".
Leaf Man is simply a man that is a leaf. He is flat, and his head is shaped like a leaf. On his head he only has two eyes and no mouth, making him incapable of speech. The left side of his body is a lighter shade of green than the right side of his body.
- Despite his lack of mouth, he can bite.
- On February 7, 2021, Leaf Man went viral throughout the Adventure Time Twitter fan community. It primarily involved people noticing Leaf Man from the episodes he appeared in, and changing their profile pictures to him eating an apple from the episode Thanks for the Crabapples, Giuseppe!
- Leaf Man is listed as a teacher for Herbalism on Peppermint Butler's class schedule in "Wizard City".
- In the artwork during the end credits for "Wizard City", Leaf Man took over the coffee shop from the store's deceased owner, Potable Wizard.