Mojo Jojo is a mad scientist chimpanzee with great intelligence, who speaks in a Japanese accent. As the main antagonist of the series and the Powerpuff Girls' arch-enemy, Mojo Jojo was Professor Utonium's reckless laboratory assistant, Jojo, before Professor Utonium created the Powerpuff Girls.
He has green skin and pink whites in his eyes, and wears a white turban of clay with three purple upside down V-shaped lines towards the metal purple jeweled base and two purple circles inside each other on both sides at the top that covers his large, oversized brain that was caused by the explosion that created the girls. He wears white gloves and boots, a blue suit with a white belt, and a long wavy, purple cape.
Despite his high intelligence, he is not good at planning his schemes, and as a result they fall apart. However, he is a master at manipulation and trickery, often fooling the girls into thinking he has changed despite their constant encounters.