Edward Nigma, better known as the Riddler, is a recurring antagonist in DC Comics, particularly in the Batman series. He is known for his obsession with riddles, puzzles, and word games, which he uses to challenge and confound Batman and the Gotham City Police. As a criminal mastermind, the Riddler employs his intelligence and cunning to devise elaborate schemes, often leaving clues at the scene of his crimes. His role as a cerebral villain makes him one of Batman's most enduring adversaries.