Brainiac is a fictional supervillain appearing in DC Comics. He is known for his incredible intelligence, often depicted as a highly advanced alien android or a humanoid with vast mental powers. His primary goal is to collect knowledge and conquer planets, frequently clashing with heroes like Superman. First introduced in the 1950s, Brainiac has undergone various adaptations in comics, television, and film. He is often portrayed as a cold and calculating character, using his intellect to devise complex plans. His signature ability is shrinking cities and collecting them in bottles, showcasing his obsession with knowledge and control.