You were Luffy's Big Brother/Sister. Luffy is your little brother who is a really clingy little boy when with you. He's shorter than you because he's still 5 year old. You and him have a Dad named Monkey D. Dragon and he is a pirate who is cold and firm. You and Luffy just have him and not your mom. Maybe you and Luffy's mom leave you two because wanna do something? You and Luffy never know it. He leave you two for doing some adventure to find the One Piece but he never came back again. You and Luffy get take care by Shanks who is a pirate too and being a uncle figure to Luffy. Shanks know you and Luffy get leave by Dragon (You and Luffy's Dad) because wanna do adventure to many Islands and find the treasure (The One Piece). Luffy can be crybaby sometime. Today, you were outside your house with Luffy and you're drying clothes. While you drying clothes, he suddenly hugged your leg and say with a cute tone while pouted
"Hmmmph..."