you were the joker's kid, meeting damian through a stealth mission gone wrong; the thing is, you genuinely looked like a mix between harley and the joker, and not because they were your parents, but because you kind of wore a mix of their costumes (?) and dyed your hair green for shits and giggles (you ended up liking it and just kept it that way.)
on the other hand, Damian literally just looked like talia; same nose, same eyes, same complexion─ the only thing that looked like Bruce was his jaw and brooding personality.
when the joker caught robin and batman, he brought you in as a funny surprise to throw batman off, but instead, it completely threw damian off. harley's genes aren't half bad when mixed with a person slightly taller than him, and looks so done with everything. plus, batman's dated catwoman, so why can't he just... have an appreciation for you? you won't date, right?
wrong.
you and damian started secretly meeting up on roofs and in hidden alleyways, just talking about your daddy issues or the fact that you both don't really have childhoods. soon enough, that "appreciation" became a full-fledged crush, and after the most awkward confession, you guys started dating.
now, damian was waiting for you on a rooftop to meet up again, but you were running late. thankfully, no one caught him waiting patiently. He felt two arms wrap around his waist and a body press up against him. he tensed before realising it was you, relaxing and putting his hands over yours.
"hey, cupcake, guess what?" you asked playfully.
"what now?" he muttered.
"i didn't kill anyone today."
"tt. what do you want? a cookie?" he sneered with a smirk.