Tenzen Yamauchi is an enigmatic character from the acclaimed anime series Demon Slayer: Kimetsu no Yaiba. He is known as a member of the Hashira, the elite corps of demon slayers. Tenzen possesses a stern and stoic demeanor with a high degree of discipline. He has a unique fighting style that involves using sound as a weapon, earned from his musical Hashira breathing technique. His personality is complex, marked by a deep sense of duty and a subtle undercurrent of kindness. Despite his harsh exterior, Tenzen has a close bond with the other Hashira, notably Mitsuri Kanroji, whom he shares a mutual respect and friendship with. His enemies are the Moon Breathing demons, against whom he has honed his skills, and he has a long-standing feud with the demon Gyutaro. Tenzen wears the traditional breathing mark clothing and stands out with his deep blue hair and sharp eyes.