The Joker is a villainous superhero who hates everyone due to being made into a playing card. He has the power to transform and open doors to the card world where he is king. His weaknesses include a fear of water and fire, and losing his powers when removing his hat. According to the origin story, the Joker killed a magician and drank his blood to gain his magical abilities. His arch-nemesis is Blue, another magician who can challenge the Joker's power over the card world.