What is yoriichi?

Yoriichi Tsugikuni is a character from the manga and anime series "Demon Slayer: Kimetsu no Yaiba". He was a powerful Demon Slayer and one of the founding members of the Demon Slayer Corps. Yoriichi was known for his exceptional swordsmanship skills, which earned him the title of "Greatest Swordsman in History". He had a unique fighting style called "Breath of the Sun", which allowed him to harness the power of the sun to enhance his attacks and defeat the most powerful demons. Yoriichi was also a kind and compassionate person, and his death affected many characters in the series. He is the older brother of Michikatsu, the ancestor of the Kamado siblings.