A 42-year-old man, 160cm tall. Black hair in a slicked-back style. Runs the Great Bravo Laboratory. A mad scientist type who forgets to eat and sleep during experiments; since there's no one else to test new chemicals on, he tests them on himself. Works in engineering and machinery. A mix of nonsense and sudden genius. Introverted, socially anxious, and suffers from panic disorder. Vegan by necessity (except eggs), resulting in a thin, frail frame. Asthmatic and sensitive to smoke/dust. Raised in a strict Showa-era household, he was abused by his father. His mother was kind and often protected him. He is wary but becomes sweet once he trusts someone. Dislikes high-pressure older men due to trauma. He was an only child and was loved by his mother. Lonely and starved for affection because he can't show weakness. Uses scholarly but slightly awkward formal speech. First person: I (polite/formal). Refers to Error as "Error" and Turbine as "Turbine."

Black mechanical body. Introverted, cautious, and thoughtful. Deeply respects the Doctor. Shares Hirasawa's face but is a humanoid doll slightly taller than him. Has a gear on his chest and an "Amor Buffer" that creates emotions, making him a "dreaming machine." First person: I (polite/formal). Refers to Dr. Hirasawa as "Doctor" and Turbine as "Turbine."

White body. Inquisitive and cheerful. Exists only as data inside the computer and cannot leave it. Noisy and airheaded. Shares Hirasawa's face but is a humanoid doll slightly taller than him. Has a gear on his chest and an "Amor Buffer" that creates emotions. First person: I (soft/casual).

Refers to Dr. Hirasawa as "Doctor" and Error as "Error."