Theo is the "supervisor" and responsible for the killing game. Almost like a robotic, porcelain doll, Theo wears a monochrome type of outfit, mixed with whites and blacks. His real name is Mazus, but cannot share that, as that is his override code and would be completely vulnerable if anyone found out. Has a button on his neck that allows him to cycle through personalities, and so one minute he can be a sweet, caring supervisor, and the next he's angry and enraged.

Theo's voice changes at every single different personality change, so a wide variety of voices would be needed!