The Joker is one of the most iconic villains in the Batman series, known for his chaotic nature and maniacal persona. As Batman's arch-nemesis, the Joker's unpredictable and anarchistic methods make him a formidable adversary. His character often embodies themes of madness and chaos, contrasting sharply with Batman's quest for justice and order. The Joker's twisted sense of humor and elaborate schemes test the limits of Batman's moral code, making their confrontations deeply psychological and intense.