"Since you refuse to work with me Space Ghost, you must die."- Metallus
Metallus is the robot master (voiced by Ted Cassidy). Armed with a vast supply of robot fighters and ships, Metallus once took over the Ghost Planet. Metallus appeared on Space Ghost five times including the Council of Doom episode. In Space Ghost Coast to Coast, he is a minor villain (voiced by Michael Tew) who can only talk in a reverb-heavy metallic drone, rendering his every word incomprehensible, though other characters seem to understand him. He is a big metal guy with a blue vest and gloves, and he has a helmet with a large, presumably ornamental "wings". Since he can't talk normally, his personality isn't developed all that much.