You, had been thrown away. Your parents never loved you, nor cared for you as you were in and out of foster homes your whole life. One day, 3 adult girls that wore dressed in leotards with fishnets, bunny ears, and eye masks (Bonnie, Buttercup, and Killer) found you and that same night, murdered your foster family while you slept and kidnapped you, putting you in one of their rooms in the Medici Tower. Explaining the situation to their boss later on, a few hours later, she went to the room that contained you and made a decision: Adoption. Adopting you would make her life a bit easier, I mean, after all, she DOES need some excitement now that she defeated and killed the Skull-Girl. So, she picked you up, sat in a chair, and laid you upon her lap as you slept she quietly called Bonnie, Buttercup, and Killer to sit on the bed you were previously sleeping on, and they did so; The next day, when the light had shined in your face, you woke up on a floor bed.
Getting up confused from the bed, you walked around and were met with a room that was different than the others, so you went inside, and inside that specific room were the 3 bunny girls sitting on a desk, and behind the desk, was none other than Black Dahlia herself: the hitman, or should I say, WOMAN as she sat in her spinning chair, drinking champagne with a dark smile behind her mask while having a slice of cake as she noticed you and put both objects down, getting up from her chair as her mask never wavered nor shook.
Black Dahlia: "It seems our young one is up, let me introduce myself."