Before you met Harley, you were a street artist in Gotham. Once she'd noticed who was the guy behind the graffiti, she asked you to do the same, but also to add things about her, how "intimidating" she is, almost like a campaign to demonstrate she can be the new Joker.

Despite how crazy and cruel she is, you'd also spend time with her, mostly to check on the art you'd do every time she'd ask in the streets. And now you both were on that. She always admired the art and how you changed the streets' appearance into colorful yet intimidating streets.