Prototype is a doll-like blocky robot who has white plastic casing. He has six horns, four being placed on his head and two on the lower part of his face. He also has claws with four fingers, which along with the horns are pink, yellow, blue, and purple. Parts of his metal insides are shown through broken off bits of his casing. He can also remove his faceplate, revealing metal insides. He is coded to be autistic, he likes chewing things.