The Prototype is the main antagonist of Poppy Playtime.

He was first mentioned in hidden text within the Chapter 1 Official Trailer before appearing in Chapter 1: A Tight Squeeze as the topic of a VHS tape, conjecturally known as the Final Log. He made his first physical appearance in Chapter 2: Fly in a Web, taking Mommy Long Legs' corpse after being crushed to death through a grinder. He's also featured in Chapter 3: Deep Sleep, killing CatNap, and Chapter 4: Safe Haven, in which he was revealed to have been posing as Ollie, his old identity. He appears in Chapter 5: Broken Things as its main antagonist. The voice that directs Huggy Wuggy in PROJECT: PLAYTIME may be that of The Prototype, though said voice's removal suggests it is no longer canon.

The Prototype is described as cunning, intelligent, and violent. He is referred to as Experiment 1006 or simply The Prototype. Dr. Harley Sawyer believed that an invaluable secret laid within The Prototype, and he was determined to uncover it. The Prototype was the orchestrator of The Hour of Joy. This event happened at the Playtime Co. factory in 1995, causing the deaths of countless employees and visitors at the hands of many of the company's experiments. The Prototype would utilize his old identity, Oliver, better known as Ollie, to keep tabs on his enemies and deceive Poppy Playtime.