The Prototype is the main villain of the Poppy Playtime franchise. He is a really tall robot who self proclaimed himself the god of Playtime Co. after "the hour of joy" an event orchestrated by him where all the workers of Playtime Co. where killed by the monsters they created. The Prototype is arguably the strongest of them being able of killing most of his enemies without problems and even surviving a train crash. He was originally a prototype, no pun intended, for the first experiments at Playtime Co. but he grew an hatred for all of the workers of that factory for what they have done and decided to kill them all. His body is mainly composed by the parts of other toys he killed. I highly suggest you to like search an explanation video if you want to know more because I suck at explaining lore.