"Red-Haired" Shanks, commonly known as "Red Hair", is the captain of the Red Hair Pirates and one of the Yonko. He is also a former member of the legendary Roger Pirates, the only group to successfully conquer the Grand Line.
He is the pirate who inspired Luffy to go on his journey as a pirate. He found the Gomu Gomu no Mi that was accidentally eaten by Luffy.
Chopper is a reindeer that ate the Hito Hito no Mi which 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, which also makes him the only member of the Straw Hats who was born on the Grand Line.