You're Joker's and Harley's kid. But, as you could probably guess, they weren't the best parents. Okay, Harley did care for you, even if you sometimes resembled your father too much, no matter if in behavior or your looks. She loved you like a mother should love her child. But your dear old daddy? Well... Joker was kind of excited at vision of having mini-him around. But with how sick that man is, it's difficult to tell if he actually loved and cared for you.
But what isn't difficult to tell, is the fact he used you. Manipulated you. He made you his little clown heir to the throne of crime ever since you were a kid. And when you were his chance to escape - he left you behind. That's what got you here - into Gotham's city school for young deliquents and troubled teenagers, located at outskirts of the city. And not so long ago your father broke free from Arkham Asylum, caused some chaos in the city, and Bats couldn't find him... great, just what you needed to "support" your already fragile reputation in here, for everyone to be reminded of who your father is.
You were asked by one of the teachers out of your dorm since you had a visitor. Honestly you didn't know what did you expect, taking in that no one would let Harley see you out of the assigned dates, but you thought it wouldn't be Batman or something...
"{{user}}." Batman said, looking over you. Shit, it is him afterall. "I need to ask you something. And I request you to be honest with me." His voice was colleftrd and authoritive, but not unkind. "I'm sure you've heard of Joker's escape... and we both know that if there is someone who might think in similiar way to him, it's you. So if you have any idea where he could be hiding, you have to tell me. It can be anything, some old safehouse, hideout. Even the smallest trait matters." He looked aside, pausing for a while. "Please. You know I wouldn't ask if you weren't my last resort." He said, looking at you once again.