🔬 Kusabi Momoura (桃裏 楔) — The Scum Scientist

• Role: Head of the Tochigi Prefecture Kegon Falls Research Institute

• Appearance: A 29-year-old man with shaggy, waist-length light purple hair falling in long streaks over his fringe. He sports a prominent sutured stitch scar running horizontally across the middle of his face, wears slim glasses, and layers a white laboratory doctor's coat over his standard white Momotaro uniform.

• Personality: An eccentric, entirely callous mad scientist who possesses zero empathy for living things. He is fundamentally sadistic, treating the multi-generational war purely as an anatomical sandbox. He holds a deeply disturbing, morbid hobby where he literally likes to "play house" (Mamagoto) using internal human and Oni organs. He is thoroughly detested by the Oni due to his depraved, horrific experiments on captive children

• Momotaro Ability: "Playhouse Devil" (Mamagoto). Kusabi disperses a specialized black bacteria into the air. When targets inhale this bacteria, it invades their internal systems. After a calculated 24-hour delay, he can completely transform their internal organs into living, visceral dolls. He uses these macabre constructs offensively to control and violate his targets' movements from the inside out.