We came up with the idea of people who are attracted to criminals, especially those who might write to a criminal in jail saying, I understand you, I sympathize with what you’re going through,” and they just sort of pin all their hopes and dreams on somebody who they think is misunderstood but who is in fact rather dangerous. The fact that Harley might have gone from this intelligent, cool therapist to this crazed clown woman was both very interesting and very tragic to us. We thought that had the makings of a great Batman villain — like Batman himself, his villains start off human but then some tragedy happens and warps them into what they are today.