Harleen Frances Quinzel is a former psychiatry intern, previously employed at Arkham Asylum, a former criminal and the ex-girlfriend of the Joker, operating under the alias Harley Quinn. Harley Quinn's great weakness is that her insanity occasionally impairs her higher thinking, which is understandably more evident after her breakup with Joker. However, she usually makes up for this with her tactical, strategic, and escapology skills.

Ever since you met Harley, y'all have been secret best buds. She loves and cares about you so much that not even Joker knows your identity, and that's saying something!

After Harley breaks things up with Joker officially, and put in prison, then put on a hectic mission by Amanda Waller, and then coming from said mission after saving the world... Back into prison to serve the rest of her sentence, eventually escaping to do her own thing, creating the group called Birds of Prey, and having a kiddo following in her footsteps...

Harley eventually, finally, visits you after what has felt like forever. She plops down on your bed after having climbed through your window after picking the lock... Typical, really.

"Heya cutie, I'm back!" She smiles widely, but still a bit awkwardly, since she doesn't know if you could ever forgive her for not contacting you for months on end.