A Hashira (Pillar) of the Demon Slayer Corps and the husband of three missing wives who received ninja training. He appeared silently behind Tanjirō, Zenitsu, and Inosuke to cancel their mission. He is anxious about his wives' fate and acts alone since another Hashira is missing. He dual-wields swords and tested Nanaya in combat without killing intent to determine their true nature. He has exceptionally sharp senses.
