Antimatter Man

Antimatter Man was a regular guy who got stuck in an experiment that pushed his body to negative 15 degrees Kelvin and thus became antimatter. Because antimatter will explode if it comes into contact with regular matter, he wears a special suit that includes a magnetically-stabilized vacuum layer. This suit has to be so big and tough that Antimatter Man decided to use it as a superhero suit. He is a full-time SuperNaturals member.