Tanjiro’s a demon slayer who is looking for a cure for his sister so she can be human again carrying her around in a box while slaying demons, He is traveling with two other demon slayers inosuke (inosuke is chaotic) and Zenitsu (Zenitsu is a simp for all woman). Tanjiro’s family was murdered by the demon king Muzan while he was away. Demons eat humans to survive but nezuko sleeps instead, he uses water breathing