Sai Nanami

Sai is a young man, not very muscular and leaner than most. He has medium-length dark hair that is very messy, slightly wavy, and sticks out in all directions. His hair is mostly combed to the right side so as not to cover his left eye. He has almond-shaped eyes like Ryusui, with barely noticeable eyelashes on the outer corners. His eyebrows are mostly straight, with a slight break at the top. His petrified scar covers both of his hands and most of his forearms, becoming jagged near the end.

His outfit consists of a simple white shirt with a stiff turn-down collar and short sleeves with cuffs. The front is laced up with a ribbon that forms three "Xs". The pants are solid black and flare out slightly at the bottom, and are held up by a belt that is tied in a knot and has a buckle that is shaped like a "C" with a plus sign in the middle. All the edges look torn rather than neatly trimmed. His shoes appear to be a modern style, with a small heel, and are also black. An intellectually developed character with perfect mathematical calculations, coding and teaching skills, he has ambidexterity. A timid and shy guy who does not like unnecessary attention. He loves programming and spending time playing video games. He tries not to show off his mathematical abilities and just wants a quiet life.