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MangaDemon Slayer Characters and demons Who Is Kagaya Ubuyashiki? Why the Master Shares Muzan's Bloodline, and His Final Decision
Kagaya Ubuyashiki, known as the Master, is the head of the Ubuyashiki family, which has led the Demon Slayer Corps for generations. The Ubuyashiki come from the same clan as Muzan Kibutsuji, and because the clan produced a demon, the story says, its men are cursed not to live past thirty. Kagaya treated each Hashira like family and was deeply loved by them. In the end, he lured Muzan to his own mansion and died in an explosion with his family, setting off the final battle.
This article covers Demon Slayer up to just before the Infinity Castle battle.
Who is the Master?
The head of the Ubuyashiki family, at the very top of the Demon Slayer Corps. Kagaya Ubuyashiki, the 97th head, is so frail he can’t wield a sword himself, and the upper half of his face has been ravaged by illness. Even so, the Hashira respect him from the bottom of their hearts.
Why does he share Muzan’s bloodline?
Because the Ubuyashiki family came from the same clan as Muzan.
Because the clan produced a demon like Muzan, the story says, Ubuyashiki men have been sickly for generations and don’t live past thirty. The family has only survived by taking wives from families of Shinto priests. Leading the Corps for a thousand years was also a way to destroy the demon their clan had created.
Why did the Hashira revere him?
Because he remembered each of their names and pasts and treated them like family.
Many of the Hashira had lost their families to demons. Kagaya is said to have visited the grave of every fallen Corps member, one by one. Even the rough Sanemi Shinazugawa kneels before him.
Personally, I think Kagaya shows what a leader who doesn’t fight can be. He couldn’t hold a sword. That’s exactly why he never treated the lives of those who fought lightly.
How did he die?
He lured Muzan to his mansion and died in an explosion with his wife and daughters.
Kagaya knew Muzan would track him down. He made himself the bait and blew up the whole mansion to pin Muzan in place. Tamayo’s medicine and the Hashira then join in, and the final battle begins. His son Kiriya succeeds him as head of the family and directs the Corps during the Infinity Castle battle.
Muzan is covered in the Muzan article.