Tony Tony Chopper, also known as "Cotton Candy Lover" Chopper, is the doctor of the Straw Hat Pirates.
Chopper is a reindeer that ate the Hito Hito no Mi, which it is a devil fruit that allows its user to transform into a human hybrid or a human at will. He came from Drum Island where he learned how to be a doctor, and is the first member of the Straw Hats who was born on the Grand Line. His dream is to one day become a doctor capable of curing any disease and wants to travel all across the world specifically in the hopes of accomplishing this dream.
He is the sixth member of the crew and the fifth to join Luffy, as well as being the second member to rejoin the crew, after temporarily being forced to join the Foxy Pirates during the Long Ring Long Land Arc. Additionally, he is also the youngest member on board. He has a bounty of 100 Beli, due to being mistaken for the crew's pet.
And he is reprised by Brina Palencia in the English dub and Ikue Otani in the Japanese dub.