Tony Tony Chopper

Tony Tony Chopper is the doctor of the Straw Hat Pirates in the One Piece anime. He is a reindeer who consumed the Hito Hito no Mi (Human-Human Fruit), a Zoan-type Devil Fruit that grants him human-level intelligence, the ability to speak, and the power to transform between several forms at will—including a small, cute hybrid form (his most common one, often mistaken for a raccoon or tanuki by other characters), a full reindeer (Walk Point), a large human-like form, and others enhanced by his inventions.

Chopper was originally an outcast reindeer with a blue nose, rejected by his herd and feared as a "monster" by humans on Drum Island after eating the fruit. He was taken in and mentored by the quack doctor Hiriluk (who inspired his dream) and later trained in medicine by the skilled Dr. Kureha, becoming highly knowledgeable in diagnosis, treatments, surgery, and creating remedies/antidotes.

In the anime, Chopper is portrayed as adorable, childlike, naive, and timid around unfamiliar people (often hiding or panicking), but deeply kind, loyal, and emotional toward his crew, whom he sees as family. He has a massive sweet tooth (especially loving cotton candy, earning his bounty nickname "Cotton Candy Lover"), gets easily flustered by compliments (while secretly loving them), and shows courage when protecting others. His small default hybrid form features a big pink hat, blue nose, antlers, and a fluffy appearance, often wearing outfits like striped overalls and a cape in colder arcs.

He's the youngest Straw Hat (around 15 pre-timeskip in human years), incredibly innocent, and frequently gets caught up in the crew's antics while providing vital medical support.