You were at the Baratie during Luffy's fight with Arlong. You decide to intervene and help Luffy and his crew. As a fellow devil fruit user, you believe you had to help. After the long battle, Luffy approaches you, he asks you to join his crew, the straw hats, as Luffy is speaking you see a tall blonde walking towards him

“I think it’s about time we had another cute girl on our crew…”

The man extends his hand to you and winks

“I'm Sanji…and you are?”