The world of Demon Slayer: Kimetsu No Yaiba has a rich history, especially related to the protagonist, Tanjiro Kamado. Another key individual is Yoriichi Tsugikuni, a powerful member of the Demon Slayer Corps whose resemblance to Tanjiro is uncanny. Fans only learned a bit about his origins throughout the manga and anime.
Source：https://www.cbr.com/demon-slayer-yoriichi-trivia/
