|Height||2 meters (approximately)|
|Behind the Scenes|
|Universe||Robot Monster Universe|
Ro-Man is a species of robotic simian aliens. They are apparently natives from the Moon.
The Ro-Man leader named The Great Guidance send a Ro-Man on Earth to exterminate humanity. Ro-Man managed to kill all humans with a ray, except for a few ones who survived thanks to a scientist. He also caused massive earthquakes and released dinosaurs.
Later, Roman killed the assistant of the scientist by throwing him off a cliff and strangling the youngest girl of the group. The Great Guidance told him why he kidnapped Alice the older girl instead of killing her, and Ro-Man replied that he will not kill her but the youngest member a boy named Johnny. The Great Guidance didn't tolerate that Ro-Man could act as a human so he sent a ray on him. Ro-Man killed Johnny, but he died from the ray and his body was next to Johnny.