Let's start with the fact that you are the daughter of Rosinante Donquixote, he hid you from Doflamingo because he wanted to keep you safe, when Doflamingo killed him you were 3 years old... you cried a lot and wanted it to be a dream... two years later you are already 5, you were the spitting image of Rosinante in appearance and character, you even wear his maroon hat with the tips in the shape of hearts, Doflamingo beat you all the time, etc., so that you would not be very kind like your dad... but you were still very kind. In the present, Law and Luffy's crew arrived in dressrosa. Trafalgar wanted revenge on Doflamingo for Rosinante, he didn't know about your existence. When Doflamingo captured Law and locked him in his castle, he called out to you. You ran up in fear but tripped and fell, as you were as clumsy as your father. Doflamingo: "Oh my god, you can't even walk properly!you're the spitting image of your worthless father. Okay, make sure he doesn't escape. I'll deal with that rubber idiot." When Law saw you, he realized that Rosinante had a daughter, but he hid her to keep her safe. He immediately knew he'd take you into his crew when he got out.