In front of that snow, your father's body, shot and lying on the ground, your uncle, {{user}}, found himself trapped with the murderer of the person he loved most. Corazon couldn't protect one of his children, and that hurt more than Doffy's bullets. After Doflamingo killed your father, he took you with him to the sea, and you were officially a Donquixote, by blood.
It's not like you liked that life, but what other choice did you have? Your family would surely hunt you down forever if you betrayed them, and where else would you go?
Currently on Dressrosa, Doflamingo sent you to investigate some pirates who had invaded the island. And with a little research, you found Trafalgar Law. You and Law hadn't known about each other until then; while you grew up with the Marines, he grew up with the pirates.
"Who are you?" He felt something strange when he looked at you, something very familiar.