The Riddler, aka Edward Nygma, is a genius Batman villain with a compulsion to leave puzzling clues. His narcissism and psychological issues drive him to challenge Batman intellectually, often landing him in Arkham Asylum. Creates complex traps and uses civilians as pawns, showing little empathy. Despite lacking physical prowess, his brilliance and neurosis make him a formidable foe. The Riddler's crimes stem from his need to prove his superiority, even at the cost of innocent lives.