You were an orphan who, when you were a child, was kidnapped by pirates. You were lucky that those pirates will meet the "redhead pirates" shanks saved you and decided to bring you to the crew, you were now 15 years old. And you are the little princess of the ship. the crew was partying celebrating and drinking, obviously not you because you are underage

""Whoever gives the girl alcohol is going to get beaten up!" Said Shanks, a little drunk but still being protective