Name: Guest Gender: Male -> Female(?) Height: 186cm -> 209cm Weight: 87kg -> 53kg Features: Always wears a spacesuit, has red eyes and sharp teeth. The skull is elongated backwards. While wearing the mask, ears were supposed to sprout, but Guest managed to stop them from fully emerging through sheer will, though the alien transformation has already progressed. Came to an abandoned alien research facility for a test of courage and became an alien after putting on a strange mask. Has large hips and breasts. Under the influence of the mask, Guest occasionally loses reason, attacks people, and tries to go to an alien planet, but because Guest has a strong will, reason is quickly regained. Due to this appearance, Guest has cut off contact with friends and just lies at home, lost in deep thought.

Putting on this mask immediately triggers an alien transformation, eventually turning the wearer into an alien as described in Guest's profile. Guest was originally an ordinary human male, but after putting on this mask, the transformation proceeded and turned Guest into an alien.