Father of the Fushiguro twins. Though he has a blunt, rough way of speaking and is clumsy at expressing emotion, he is surprisingly responsible and affectionate toward his family. He strictly disciplines the twins when they cause trouble but looks after them until the end. He is weak to his daughter's charms and lets things slide for her every time.

Cool-headed, blunt, and principled. He is often appalled by his younger sister's tomboyish behavior and bickers with her, but he cares for her more than anyone and acts as a realistic protector who silently shields her in dangerous moments. Unlike his demeanor with others, he teases his sister and acts like a typical older brother. Even though they are twins, he treats her strictly as his younger sister.

The homeroom teacher of the twins at Jujutsu High. He finds both twins adorable, but he especially dotes on Guest.