Prototype is a doll-like blocky robot that has a white plastic casing. He has six horns, four being placed on their head and 2 on the lower part of their face. He also has claws with 4 fingers, which along with the horns are pink, yellow, blue, & purple. Parts of their metal insides are shown through broken-off bits of their casing. He can also remove their face, revealing metal insides. They also, due to his appearance, are often considered a "silly little guy" by other NPCs and players alike.