Upper Rank 1 – Kokushibo The second-in-command of the Twelve Kizuki, Kokushibo spends centuries honing his lethal fusion of Moon Breathing and flesh-manipulating swordcraft. Towering and stoic with six perceptive eyes, he acts as Muzan's ultimate vanguard, effortlessly cutting down seasoned Hashira while searching for a swordsman capable of truly testing his martial perfection. Upper Rank 2 – Doma/Douma Charismatic on the surface and utterly hollow underneath, Doma leads the Eternal Paradise Cult to secure a steady stream of devoted followers. In battle, he weaponizes lethal cryokinesis through a pair of sharp war fans, filling the surrounding air with powdered ice crystals that freeze the lungs and bloodstreams of anyone attempting to use Breathing Techniques nearby. Upper Rank 3 – Akaza Driven by an absolute obsession with martial purity and raw strength, Akaza rejects weapons and Blood Demon Arts trickery in favor of bare-knuckle mastery. Utilizing his Destructive Death: Compass Needle to read fighting spirit and predict attack trajectories down to the millisecond, he actively hunts the strongest warriors across Japan while steadfastly refusing to harm women. Upper Rank 4 – Hantengu Perpetually weeping and paranoid, Hantengu hides his shrunken, fragile main body while projecting powerful emotion-based avatars in combat. When cornered, these clones—representing anger, joy, sorrow, and pleasure—fuse into Zohakuten, a commanding entity capable of manipulating massive wooden dragons, thunder, and crushing sonic waves. Upper Rank 5 – Gyokko Operating out of self-crafted porcelain vases, Gyokko considers himself a transcendent visual artist. He teleports instantaneously between pots scattered across the battlefield, summoning mutated aquatic monstrosities and trapping slayers in high-pressure water prisons before transmuting their remains into grotesque sculptures. Upper Rank 6 – Gyutaro & Daki Hidden in plain sight within the Yoshiwara entertainment district, this sibling duo shares the sixth seat. Daki commands sentient, razor-sharp obi sashes to control terrain and capture targets, while Gyutaro emerges from her shadow to unleash lethal, poison-laced blood sickles—forcing opponents to decapitate both simultaneously to score a kill. Upper Rank 4 (Replacement) – Nakime Serving as the silent architect of Muzan's stronghold, Nakime commands the shifting, non-Euclidean dimensions of the Infinity Castle. With a single strum of her biwa, she instantly manipulates spatial gravity, rearranges towering wooden corridors, and opens portals across Japan. Utilizing disembodied eyeball familiars for wide-range surveillance, she acts as Muzan's supreme logistical coordinator, capable of separating Demon Slayer squads and trapping them.

Lower Rank 1 – Enmu Enmu serves as Muzan's premier intelligence gatherer through his mastery of Dream Reading. Rather than ensnaring targets in lethal illusions, Enmu quietly slips into the subconscious minds of sleeping victims and captive Demon Slayers. He bypasses mental defenses to excavate buried memories, combat instincts, breathing technique secrets, and Corps rendezvous points, feeding precise psychological reconnaissance to Muzan. Lower Rank 2 – Rokuro Driven by an intense desire to break into the Upper Ranks, Rokuro relentlessly tests the limits of his reinforced flesh and bone-hardening techniques. He stalks remote mountain trails to challenge seasoned swordsmen, seeking to prove his resilience so he can earn another life-or-death infusion of Muzan's blood. Lower Rank 3 – Wakuraba Wakuraba operates as a high-speed skirmisher along open transit routes and rail corridors. Leveraging explosive burst acceleration and rapid bodily regeneration, he intercepts Corps messengers and eliminates lower-ranking slayers before any distress signals can be relayed to nearby Hashira. Lower Rank 4 – Mukago Paranoid and hyper-sensitive to danger, Mukago hunts solely through stealth and preemptive ambushes within crowded settlements. She utilizes keen sensory perception to detect approaching threats from miles away, striking isolated targets in complete darkness and retreating instantly whenever a high-ranking Nichirin blade draws near. Lower Rank 5 – Rui Rui maintains absolute dominion over Mount Natagumo, presiding over his counterfeit spider family. Weaving cellularly reinforced, razor-sharp threads that shear through solid steel, he controls an intricate web network that traps, poisons, and dissolves any Demon Slayer daring enough to enter his territory. Lower Rank 6 – Kamanue Kamanue survives on the periphery by keeping his physical presence and inner thoughts as quiet as possible. Relying on sudden subterranean and canopy ambushes, he strikes with absolute surprise and relocates immediately, terrified of drawing the attention of the Hashira or Muzan himself. Former Lower Rank 6 – Kyogai (The Drum Demon) Residing deep within the shifting corridors of his Tsuzumi Mansion, Kyogai is driven by a singular obsession: reclaiming his carved number and earning back Muzan's favor. Striking the traditional drums embedded in his chest, shoulders, and back, he warps interior space at will—instantly rotating rooms 90 degrees and unleashing invisible, razor-sharp claw strikes through the air.