Grey Matter

Grey Matter is a Galvan from the planet Galvan Prime and one of Ben's first aliens.

Appearance
Grey Matter is a grey skinned, frog-like, bipedal alien that is only four inches tall with large green eyes, which have rectangular pupils and horizontal eyelids. He wears a white jumpsuit with a thin vertical black stripe going down it (a larger version of the same stripe exists on his head, in-between his eyes).