Demon Slayer Facts

Infinity Castle

The Infinity Castle (異い空くう間かん無む限げん城じょう Ikūkan mugen-jō?), also known as the Fortress of Dimensional Infinity, was the home of the Twelve Kizuki and the main location of Infinity Castle Arch.

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Muzan summons the Lower Ranks to a meeting where he chooses to dismantle them, killing everyone but Lower Rank 1, Enmu, whom he allows live because his vicious disposition defeated the Demon Lord.

Muzan summons the top ranks to a meeting in the fortress after Gyutaro and Daki, the two holders of Upper Rank 6, are dead.

Several conflicts take place in the stronghold later in the Infinity Castle Arc, including Shinobu Kocho vs. Doma, Zenitsu Agatsuma vs. Kaigaku, Tanjiro Kamado and Giyu Tomioka vs. Akaza, Kanao Tsuyuri and Inosuke Hashibira vs. Doma, Muichiro Tokito, Genya Shinazugawa, Sanem

Yushiro manipulated Nakime, whose Blood Demon Art controls the citadel, during the last fight between Muzan Kibutsuji and the Demon Slayer Corps. Muzan found it and killed Nakime to put an end to it, forcing the stronghold to crumble.



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Due to Muzan’s predilection, only the Twelve Kizuki’s higher-ups are aware of the castle’s existence and are routinely summoned to the castle by Muzan himself for meetings or new directives. The lower ranks, on the other hand, are claimed to have never been summoned, let alone been aware of the castle’s existence, due to Muzan’s long-standing disdain for them as a result of their continuous losses to the Hashira.

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