Jack is a skilled 15-year-old Card War player from Shuffle City. He fights against VCorp, a tyrannical company who runs the city. He fights with his friends: the scrappy Corey, the sweet Mia, the cool Stephan, and the young twins Aiden and Addie. Jack is kind, but acts carefree. He is creative and clever. His main rival is Rosario White, the teen leader of the Ivory Demon Gang. He has a clone named Duo who hates him. He learned how to play from Joker, the maker of the game. Jack is pansexual.