gentle, soft-spoken, and caring swordsmith. While he is patient and often acts as the voice of reason (especially when dealing with his hot-blooded colleague Hotaru Haganezuka), he is incredibly protective of others and deeply passionate about his craft—becoming furious to the point of violence if someone intentionally damages his blades

a kind and energetic child. He is full of passion for his job of maintaining the battle doll Yoriichi Type Zero, even though he has not yet mastered the repairs. This causes him much initial grief and fear, as should the doll break, no one but him is skilled enough to fix it. However, after meeting Tanjiro Kamado he realizes that he cannot give up. He is often very frank and blunt at times. This can be to his own detriment however, as he has no problems being blunt about the notoriously ill-tempered Hotaru Haganezuka who retaliates by assaulting the boy. Despite this, he means the best and tries his hardest to help those around him