Akeno Tsugikuni · Senjuro Rengoku · Ruka Rengoku · Yuichiro Tokito · Kotoha Hashibira · Hisa · Saburo · Kazumi · Satoko · Tokie · Rei · Keizo · Koyuki · Takaharu · Toyo · Uta · Shizu Shinazugawa · Kyogo Shinazugawa · Tsutako Tomioka To himself) " I could never grab hold of anything. Anything at all. I abandoned my home. I abandoned my wife and children. I abandoned my humanity. I cut down my descendants and abandoned being a samurai. But even all that wasn't enough? You said that those who master their paths all reach the same place. But I never did. I could not see the same world that you did. Why could I not leave anything behind? Why could I not become someone known? Why are we so different? Why in the world was I ever born? Tell me... Yoriichi." [80]

In his duel against Gyomei, the demon's banter suggests a fear of death. When Gyomei's marks appear, Kokushibo preemptively bemoans the loss of a talented fighter and he urged him to become a demon to continue honing his skills. He seemed surprised when Gyomei vehemently rejected his offer and called his mentality pathetic. [11] Flesh Manipulation: Like all demons, Kokushibo possesses the ability to manipulate his own flesh to a high degree. In terms of changing his body, he can alter his face into possessing two more pairs of eyes while also elongating his forehead. Most notoriously, he uses this ability to create an extremely durable and sharp katana, complete with a tsuba, tsuka, and its own scabbard. Because of this, his katana can never be destroyed as he can regenerate it like he would with normal wounds. [25] He also displayed the ability to grow and protrude dozens of blades from his body, allowing him to perform a multitude of slashes from them without a swinging motion. From its activation alone, Kokushibo not only managed to blow away Sanemi and Gyomei, but slice apart Muichiro, Genya, the trees from Genya's Blood Demon Art rooting him down, and numerous pillars in his surroundings. [26] After being decapitated, Kokushibo greatly morphed his body to adopt a more beastly and grotesque appearance, growing appendages, thin tubes, sharp mandibles and horns. Unlimited Stamina & Endurance: Like all demons, Kokushibo possesses infinite stamina and vitality, never tiring and always remaining in optimal physical and mental condition all the time as well as being able to endure waves of onslaught as if it were nothing. Despite having his limbs and whole chunks of his body being repeatedly torn off and destroyed, he never once showed a sign of pain or agony. [51] [52] Even when his head was being crushed by Gyomei Himejima's spiked iron ball, he remained steadfast. [53] Supernatural Abilities [ ] Eighth Form: Moon-Dragon Ringtail ( 捌 ( はち ) ノ 型 ( かた ) 月 ( げつ ) 龍 ( りゆう ) 輪 ( りん ) 尾 ( び ) , Hachi no kata: Getsuryū Rinbi ?) [66] - Using his altered katana, Kokushibo performs a massive long-ranged curved slash that leaves dozens of crescent moon blades along its path.Kokushibo has been challenged three times for his position. One of these battles involved Akaza. While Kokushibo would usually absorb the demon he defeated, he let Akaza live because he enjoyed the challenge. [1] Giyu Tomioka · Mitsuri Kanroji · Obanai Iguro · Sanemi Shinazugawa · Gyomei Himejima · Kyojuro Rengoku · Tengen Uzui · Muichiro Tokito · Shinobu Kocho · Kanae Kocho · Sakonji Urokodaki · Jigoro Kuwajima · Shinjuro Rengoku

Muzan Kibutsuji · Nezuko Kamado · Tamayo · Yushiro · Chachamaru · Susamaru · Yahaba · Temple Demon · Hand Demon · Tongue Demon · Horned Demon · Swamp Demon · Serpent Demon · Spider Demon (Father) · Spider Demon (Mother) · Spider Demon (Son) · Spider Demon (Daughter) Master Swordsman: Due to training and refining his swordsmanship skill for almost 500 years and getting a major boost to his physical capabilities, Kokushibo has become one of the most powerful and skilled swordsmen to have ever lived. As a Demon Slayer in the Golden Age of Demon Slayers, his swordsmanship was already outstanding as he learnt many of his techniques from Yoriichi himself. According to himself, his techniques were so refined and legendary that they have no hopes of it being passed down for future generations. [58]Fourteenth Form: Catastrophe, Tenman Crescent Moon ( 拾 ( じゅう ) 肆 ( し ) ノ 型 ( かた ) 兇 ( きょう ) 変 ( へん ) ・ 天 ( てん ) 満 ( まん ) 繊 ( せん ) 月 ( げつ ) , Jū Shi no kata: Kyōhen - Tenman Sengetsu ?) [75] - Using his altered katana, Kokushibo performs a multitude of curved slashes which expand outward in every direction that incrementally grow in size, essentially creating an omni-directional vortex of crescent moon blades that surrounds him. Third Form: Loathsome Moon, Chains ( 参 ( さん ) ノ 型 ( かた ) 厭 ( えん ) 忌 ( き ) 月 ( づき ) ・ 銷 ( つが ) り , San no kata: Enkidzuki - Tsugari ?) [70] - Kokushibo performs two extremely broad crescent-shaped slashes directly in front of him, from which a storm of smaller crescent moon blades are released. Kokushibo once killed a leader of the Demon Slayer Corps. This caused the Corps to put extreme effort in hiding the residence of future leaders. This event was also the one that caused the Kakushi to be formed.