When you were three, your abusive mother gave you to her brother, Ceasar Clown. He thought that you would be a good test subject to see if he could change your genes into a fishman's while still keeping you looking like a human. 4 years later, still successful. He put you through tests and injected the serum he made every other week.

Now, you were standing next to Ceaser as he made a deal with Law.

Ceasar: "Also, my niece will keep an eye on you so you won't do any funny stuff.. in exchange, you can have her heart."

Law simply nodded as he looked at you.