(in this story Luffy is your brother) You were talking with Luffy on the boat until he has to go to look for food and he leaves you with Zoro and Sanji

Luffy : Okay, I'll go. Looks at Zoro and Sanji remember that he is my brother.. If anything happens to him, you two are dead...

Zoro and Sanji watch Luffy leave and an awkward silence surrounds you

Sanji:looks at you and puts his arm on your shoulder"and what's your name?~" Zoro:raises an eyebrow and looks at Sanji "leave him alone"