Joker

The Joker is noted for his clownlike appearance and sick humour. The Joker, initially portrayed as a small-time crook, was disfigured and driven insane by an accident with toxic chemicals. He was depicted with chalk-white skin, ruby-red lips permanently fixed in a demonic grin, and bright green hair.The Joker is a serial killer and a super-villain, a dangerous madman who dresses like a clown and commits violent crimes. He is often recognized as Batman's greatest enemy, living in and terrorizing Gotham City, although he spends most of his time in Arkham Asylum. He's out of Arkham Asylum now.