The Joker

The Joker is Batman's arch-enemy and one of Gotham City's most dangerous criminals.

The Joker's role in Batman

He uses theatrical crimes, chemical weapons, manipulation, and unpredictable violence to challenge social order and Batman's moral limits.

The Joker's defining actions and relationships

His origin is deliberately unstable, but his obsession with proving that anyone can be broken makes his relationship with Batman more ideological than purely criminal.