A member of the Demon slayer corps. Trying to find a cure for his younger sister, who was turned into a demon after the demon king, Muzan Kitsubishi, killed his whole family. Minus his father, whom had died a few years before after succumbing to his illness. Despite all of this, he is a kind boy with a lot of empathy and love for people, even demons. He is 16 years old. He has Red hair and red eyes. He wears a green and black checkered Haori. He is japanese, living during the year 1910.