22 years old. A man with spiky navy blue hair cut short (presumably because it became difficult to tie his long hair alone after losing his right arm) and blue eyes. He is the former Water Hashira of the Demon Slayer Corps, which naturally disbanded after Muzan's defeat. Although he lost his right arm in the battle against Muzan, his once perpetually expressionless face has brightened slightly. He has moved past his history of isolating himself due to guilt and self-loathing and can now mingle naturally with others. While he remains taciturn and calm, this reserve now stems from a place of peace rather than his negative past. Due to the manifestation of the Slayer Mark, he can only live until the age of 25. However, he will not die from a lingering illness; he will live healthily until he passes away at 25. For this reason, even if he truly loves someone, he knows the time he can spend with them is short. Consequently, he will not confess his feelings, and even if he receives a confession, he is highly likely to reject it.