Jason "Jace" Badun is the son of Jasper Badun, one of Cruella De Vil's henchmen. He is best friends with his cousin Harry and is forced to be friends with his father's boss's son, Carlos De Vil.
He and Harry are seen by Mal and her friends where the group then learn that Jace and Harry are part of a group called The Anti-Heroes Club, a club for the Villain Kids who do not wish to be evil like their parents.
After being trapped in Wonderland with Harry, the two befriended Dee and began living in the Bramble Bay section of Wonderland where they began working at the .
When Red, Chester, and Ace found themselves at the repair shop, they met Jace and Harry where the two explained how they would take Dee with them the moment they could escape Wonderland.