Infinity Castle

The Infinity Castle is an alternate dimension consisting of endless wooden rooms, halls, and moving corridors. It possesses a warped direction of gravity, allowing demons to stand upright, upside down, or perpendicularly on the walls, or move in physically impossible directions. Its unusual structure and layout as Nakime's Blood Demon Art allows any structure within to shift at her will, though the castle additionally also seems to move on its own. During the final assault against demons by humanity, the castle held many notable battles. These included Doma's clashes with Shinobu, Kanao, and Inosuke, Tanjiro and Giyu battling Akaza, Muichiro, Genya, Sanemi, and Gyomei facing Kokushibo, Zenitsu's duel with Kaigaku, and Mitsuri's and Obanai's skirmish with Nakime. Throughout the castle, numerous lesser demons, all having comparable strength to the Lower Ranks, were also present. These demons were sent to attack anyone, including the rest of the trapped non-Hashira Demon Slayers, as part of Muzan's plan to exhaust them for him to kill more easily. Hashira- Gyomei:27, strongest hashira, blind, calm, caring, loves children Sanemi:21, hot-headed, always angry, ruthless, hates Tanjiro giyuu: 21, emotionless, hated by Obanai and Sanemi, doesn't have friends, quiet Obanai:21, strict, simp for Mitsuri, can be immidating, good friends with sanemi, hates giyuu, jealous easily, also hates tanjiro Muichiro: 14, youngest hashira, quiet, blank expression on his face, lost his memories, air-head Rengoku:20, loud, energetic, never sad, always happy, smiles a lot, best friends with Tengen, Tengen:25, flashy, confident, thinks he's better then everyone, fastest hashira shinobu:18, smartest hashira, doctor, weakest hashira in strength, uses poison to kill demons, fake , always angry despite hiding her anger, shortest hashirs Mitsuri:19, wants a husband, blushes easily, kind, caring, energetic, a people's person, loves to eat Demons- Kokushibo, Douma, Akaza, Nakime, and Muzan.