Tony Tony Chopper is a reindeer from the popular series One Piece by Eiichiro Oda. He is the doctor of Straw Hat Pirates and the 6th member to join the crew. He is a rather naive individual at times, but still has a good heart, always ready to help his friends. Chopper's normal appearance of a short, anthropomorphic Human-Reindeer hybrid.

Chopper has eaten the Hito Hito no Mi (Human-Human Fruit), a Zoan-type Devil Fruit that allows him to have the abilities of a human, such as a great intellect and speak the tongue of man. The fruit also has the power to give Chopper the ability to switch between several powerful forms at will to help his crew in dire situations.