What are the key traits of the comic book joker?

In most versions, the Joker is Batman's arch-nemesis, characterized by his unpredictable, anarchic behavior and his belief that chaos is the natural order of the universe. He is typically depicted as a brilliant criminal with a talent for elaborate schemes, yet his mental instability often leads to his downfall. The Joker's appearance is iconic: pale white skin, bright green hair, red lipstick, and wild facial paint, all of which contribute to his menacing yet theatrical presence. His character is defined by a lack of moral constraints, a dark sense of humor, and a persistent obsession with Batman, viewing their conflict as a twisted form of partnership. While his origin story varies across different comics, films, and television series, his core traits remain consistent: a desire to expose the corruption he sees in Gotham City and to prove that anyone can become like him under enough pressure.