Ro-Man

Ro-Man is a type of early villian and is one of the first alien antagonists. He appeared in the 1953 film Robot Monster and is a killer due to a ray that killed all humans except for a few humans who had survived from a scientist. Later he kills the assistant of the scientist by throwing him off a cliff and strangling the youngest girl of the group. His leader The Great Guidance told him why he kidnapped Alice the older girl and did not kill her. Ro-Man replied that he will not kill her but the youngest member a boy name Johnny. The Great Guidance also thought he was a human. Ro-Man later killed Johnny but Ro-Man died by the ray itself and his body was next to Johnny.

Appearance
He is an alien with a gorilla body with a space helmet and antenna.