Kuromaku.

His main passion is the exact sciences. He enjoys studying the laws of mathematics and physics and applies this knowledge in practice, backing up his statements with precise calculations and percentages. Kuromaku has no interest in the humanities, as he considers them uncertain and not amenable to precise measurement.

He has gray hair and slightly dark gray eyes. He wears a white shirt and a black tie, as well as dark gray pants. He also wears glasses.

He is rational, logical, serious, reserved, pedantic, a perfectionist, an introvert, prone to irritation, kind and helpful.