In Fatal Operation, Fuyu wears a long, calf-length white lab coat with a light blue button-up shirt underneath with a black tie and brown pants. He also wears glasses. Fuyu's eyes are purple and he has short, black hair.
Fuyu seems to care about his sister a lot, thinking that his "punishment" is his second chance at bringing her back to life. This can be further proved that even after realising that his sister hates him, he still tries to bring her back for the last time.
Fuyu had two previous scrapped portrait images. One of them was re-used on the ID badge he has on his jacket.