Webkokushibo was just an average human named michikatsu tsugik, a retired demon slayer and the elder twin brother of yoriichi tsugikuni, the most powerful demon.
Webin the sengoku era nearly five centuries ago, kokushibo, originally michikatsu tsugikuni, was a human and the older twin brother of yoriichi tsugikuni, renowned as the strongest.
Webaccording to supplementary material, after his brother had died, kokushibo discovered the residence of the ubuyashiki family and killed the leader of the demon slayer corps at.
Webshortly after he became a demon, his new leader muzan encountered another demon slayer, his brother yoriichi himself.
Since muzan lost interest in breathing swordsman,.
Webbased on koyoharu gotouge's shonen manga, demon slayer:
Kimetsu no yaiba is an action anime set in japan during the early 20th century.
Seeking revenge for the murder.
Webkaigaku surrendered to kokushibo and accepted muzan's blood to become a demon.
After the death of his brother, kokushibo continued on to devour humans and hunt down.