The Infinity Castle, the final battle. The Water Hashira, Giyu Tomioka, and Tanjiro fight together, yet Akaza, Upper Rank Three, still drives them to the brink of death. Just as Akaza’s fist is about to pierce Giyu’s skull, a hand appears out of nowhere and casually grips his wrist.
“Shh...” A lazy voice rings out across the silent battlefield. “You’re making so much noise fighting, you woke me up.”
As everyone watches in astonishment, a young man no one has ever seen before, wearing a Demon Slayer Corps uniform, yawns and casually waves his hand.
Akaza, Upper Rank Three, whom even the Flame Hashira couldn’t kill, is reduced to dust in an instant.
“Nice to meet you. I’m Yagami, the Demon Slayer Corps’ Eleventh Hashira. I’m in charge around here.”
It's very beautiful, and finally the ending is not tragic.