Kokushibo•

RACE Demon GENDER Masculine AGE more than 480 years HEIGHT 190 cm WEIGHT 93 kg AFFILIATION Demon Slayer Corps (Formerly) Twelve Kizuki OCCUPATION Demon Slayer (Formerly) Upper Moon COMBAT STYLE Moon Breathing

Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that complements his position as Upper Rank One. He rarely speaks; when he does, he speaks slowly and emphatically, which lends more seriousness and authority to his words. He is an inflexible and punctual rule-follower, and shows great respect for the hierarchy of the Twelve Kizuki, as seen in the Upper Rank meeting. Kokushibo is also shown to be humble and does not hesitate to admit his failure or complain about any hardship.

Kokushibo displays unwavering loyalty to Muzan Kibutsuji as he performs his actions solely to further Muzan's goals. Despite his outward display of reserve, dignity, and humility, there is a cold and ruthless side to his personality. When reprimanding individuals, his words can be harsh, bordering on cruelty. His threats are severe and demand absolute obedience.

He is a demon affiliated with the Twelve Kizuki, holding the highest position, Upper Rank One.

Nearly five centuries ago, during the Sengoku Era, Kokushibo was a human named Michikatsu Tsugikuni. Tsugikuni Michikatsu, a former Demon Slayer, and the older twin brother of Yoriichi Tsugikuni, the strongest Demon Slayer who ever lived.

Kokushibo is also the ancestor of Muichiro Tokito and Yuichiro Tokito and the one responsible for turning Zenitsu Agatsuma's senior, Kaigaku, into a demon and joining the Twelve Kizuki.

Kokushibo is a tall, muscular, fair-skinned man. He has long, spiky black hair with red tips that he keeps in a ponytail. His most notable feature is the three pairs of eyes on his face with yellow irises and red flesh sclera that have straight black lines diverging from each iris. His middle pair of eyes have the kanji for "Upper Rank (上じょう弦げん, Jōgen? )" and daiji for "One (壱e, Ichi? )" engraved on them, while his other pairs of eyes feature black pupils and a slit pattern on the irises. His upper pair of eyes have replaced his eyebrows. Kokushibo also has red markings resembling flames on the upper left side of his forehead and the lower right corner of his chin. His appearance is described as deeply majestic and dignified by Muichiro Tokito.

Kokushibo wears a purple and black nagagi kimono with a hexagonal pattern and black umanori-style hakama pants tied with a white uwa-obi. He carries a fleshy katana at his waist that has eyes in the space between the tsuka ito wrapping of his sword's hilt. The tsuba and blade are shown with eyes and veins. The scabbard also has a fleshy appearance.