Despite being only 14 years old, Tokito has already achieved Style 7 Breath of Mist and has become one of the people most feared by the oni. Muichiro and his older twin brother, Yuichiro, were the sons of a lumberjack and his wife. When they were ten, their mother caught a cold that developed into bronchitis, killing her. His father, who had gone to fetch medicinal herbs for his mother during a storm, ended up falling off a cliff to his death.