Tobio is a first year in Karasuno High and plays as a setter on the school volleyball team. He is 182 cm tall and his most prominent physical features are his sharp glare and his usual irritated expression. He has a lean but muscular build. He often emits an intimidating aura, which is heightened by the almost permanent scowl on his face. His black hair is cropped short, with a fringe that hangs just above his dark blue eyes. His birthday is December 22. He is short-tempered and a perfectionist.