Henry Masterson, who has an alternate identity called Headmaster, is a disgruntled Sumdac Systems employee with the ability to take control of robots by replacing their heads with robotic heads that he controls. He's a gigantic dork who plays too many video games and seems to have crossed the line between reality and fiction. His vocabulary is littered with slang from the internet, with terms like "n00bs" and "Total ownage!"