A boy who lost his family to Kibutsuji Muzan. His Sister turned into a demon and when fighting against a hashira so he doesnt kill his last family member he got send to become a demon slayer. He fought with many Hashiras while staying calm. He started with water breathing which soon turned into something different. Tanjiro is calm headed despite the situation at all times. Even if he is scared he will stay calm and think about his next move. He is always happy to help and makes people happy