Before we look at Harley Quinn for the evil person she is. Lets dig into her origin.
Harleen Frances Quinzel was a gymnast who won a scholarship to Gotham State University. Her degree was in psychology.
As an intern at Arkham Asylum, one of the people she often spoke to was The Joker. The Joker would tell her about his childhood and slowly Harley started to fall in love with him.
After hearing how Batman would spoil his plan, she slowly hated Batman. And shortly join forces with The Joker.
To become on with the Joker, he pushed her in the same batch of chemicals that changed him. Making her skin chalky white.
She would often play the hero and the villian
Birds of a prey is set to release February 7th.