"Shanks is the chief of the Red-Hair Pirates and the person who Luffy looks up to the most. He was an apprentice on Gold Roger’s ship along with Buggy, but now he is one of the Four Emperors of the Sea. Even Sengoku, the former Navy Fleet Admiral, acknowledges his superiority. He is usually very easygoing, but he shows no mercy on those who hurt his friends.
While making Windmill Village in the East Blue his crew’s base, he met the young Luffy. One day, he saved Luffy, who had been thrown into the sea and attacked by a Sea King. This cost Shanks his left arm. When he left Windmill Village, he entrusted Luffy with his trademark straw hat and made him promise: “Come bring it back to me someday once you’ve become a great pirate.”"