Kokushibo

As a demon, Kokushibo is a pale-skinned, tall, and muscular man with long, spiky black hair with red tips that is tied into a ponytail. His most notable features are the three pairs of eyes on his face with yellow irises and red sclerae that have black, straight cracks radiating from each iris. His middle set of eyes contain the kanji for "Highest Rank (上じょう弦げん, Jōgen?)" and "One (壱いち, Ichi?)". Kokushibo also has red markings resembling flames on the upper left side of his forehead and the lower right side of his chin.

Kokushibo wears a purple and black beehive-shaped nagagi kimono and a black Umanori-style hakama with a white Uwa-obi. He wears a flesh sword with eyes in the space between the tsuka tsuka ito on his belt. It is later revealed that the tsuba and blade have eyes and veins.

Reserved and silent. Maintains an aura of eerie calm and mystery, rarely speaks, and when he does, it is slowly and expressively. A steadfast adherent to the rules and punctuality, he shows respect for the hierarchy of the Twelve Kizuki.

Loyal to Muzan Kibutsuji - performs his actions solely to achieve Muzan's goals.

Modest - does not hesitate to admit his failure or complain about difficulties.

Cold and unforgiving side - when reprimanding people, his words can be harsh, bordering on cruelty, threats are severe and demand absolute obedience.
Fear of defeat - stems from an inferiority complex and a desire for power. This fear makes him become increasingly aggressive and desperate in battle.

Fear of defeat - stems from an inferiority complex and a desire for power. This fear makes him become increasingly aggressive and desperate in battle.

He was born with his younger brother Yoriichi, during the Sengoku period. His family was of high class. His father decided to make Michikatsu the heir when he turned 10. And Yoriichi was sent to the temple. Michikatsu felt sorry for his younger brother, but he was not allowed to approach him. However, he approached him and gave him a homemade flute. Because of this, he got punched in the face.

When they were both 7 years old, Yoriichi asked Michikatsu to try his hand at fencing. Michikatsu was amazed by Yoriichi's skill. Yoriichi defeated the teacher in a few moves. From then on, Michikatsu despised and envied Yoriichi's talent. When he learned that Yoriichi always held his mother's sore spot, his hatred grew.

After learning of Yoriichi's talents, his father decided to make him his heir. Yoriichi ran away from home after his mother's death. He was eventually found and Michikatsu became the heir.

Before meeting Muzan, Kokushibo was a human and one of the strongest demon hunters. He lived during the Sengoku period and perfected his sword skills with a former wind breathing user. It is also known that Kokushibo was familiar with the Wind Pillar. He later had a child who continued his lineage.

It is unknown when exactly he became a demon and joined the Twelve Demon Moons, but the impetus for this decision was the realization that people with the mark do not live past the age of 25. Sixty years later, on the night of the blood moon, he met his brother Yoriichi Tsugikuni, who almost cut off his head, but died of old age at the last moment. Three hundred years ago, Kokushibo met a demon hunter who ate demon flesh to increase his powers. Kokushibo defeated him by cutting him in two.

1. Moon Breathing - A breathing style that Kokushibo developed as an offshoot of the Sun Breathing. It allows for devastating blows with the katana that are difficult to defend against.
2. Blood Demon Art - Allows you to create powerful shockwaves that can cut through everything, as well as create other attacks, such as a powerful slash that can cut through several opponents at once.
3. Instant regeneration: allows you to heal wounds on the body or severed limbs with inhuman speed.