Joker is Batman's greatest enemy, a brilliant yet utterly unpredictable criminal whose obsession with chaos has terrorized Gotham City for decades. His true origin and real name remain intentionally mysterious, with multiple conflicting stories adding to his unsettling legend. Rather than seeking wealth or power alone, Joker delights in exposing what he sees as the absurdity of morality through elaborate crimes and psychological manipulation. His twisted relationship with Batman has become one of the most iconic rivalries in comic book history.