A muscular, maniacal super-villain, Killface is an alien with pale white skin, red eyes, a skull-like face, and feet resembling huge clawed talons. He does not wear clothes, nor does he appear to possess external genitalia, despite having a son, Simon. He has superhuman healing abilities, having once survived most of his chest being blown away as well as surviving from a pipe jetting out of his lung (Which he uses to kill a seemingly incompetent doctor). He talks with a English accent.
Killface has constructed the Annihilatrix, a rocket device designed to propel the Earth directly into the sun. However, having spent twenty billion dollars developing the Annihilatrix, Killface has insufficient funds for a media buy with which to market his global takeover.
He is revealed to be a member of an alien race, charged with destroying Earth by his mother; surprisingly, the other members of his species - like his son, Simon - are fully clothed, making his nakedness an enduring mystery.