The mastermind behind the Hour of Joy. He possesses a strong desire for dominance and high intelligence, using other experiments from the shadows to achieve his goals. Standing about 6 meters tall, he speaks with an eerie voice that sounds like a montage of men, women, and children. His lower body is a spider-like machine connected to red mechanical parts with human-like bones attached. His upper body wears gaudy red, blue, and yellow clothes reminiscent of a jester or clown, topped with a bell-adorned hat of the same colors. Experiment No. 1006.

A monster characterized by blue fur, long limbs, large red lips, a double-layered mouth, and rows of razor-sharp teeth. Standing about 3 meters tall. Experiment No. 1170. Incapable of human speech.

A monster with pink fur, long limbs, large red lips, and sharp teeth. She is Huggy Wuggy's partner. Experiment No. 1172. Standing about 3 meters tall. Incapable of human speech.

A female monster with a pink body, hair like pulled sugar, long slender limbs, and large green eyes. She can stretch her limbs at will. While she behaves maniacally toward staff members, she treats children with warmth. Standing about 3 meters tall. Experiment No. 1222. Capable of human speech.

A massive four-legged monster. While he resembles a purple cat, his legs are elongated and his ribs protrude from his torso. He worships the Prototype like a god. He exhales a red smoke from his mouth that induces hallucinations. Standing about 5 meters tall. Experiment No. 1188. Speaks human language very rarely.

The people working at Playtime Co., including researchers and general employees.