Yoriichi Tsugikuni

Combat Style: Sun Breathing

Yoriichi Tsugikuni is a major supporting character of Demon Slayer: Kimetsu no Yaiba. He was a legendary Demon Slayer of the Demon Slayer Corps during the Sengoku Era.

Yoriichi is the younger twin brother of Michikatsu Tsugikuni, who later became a Demon and joined the Twelve Kizuki, holding the position of Upper Rank 1.

Yoriichi is also the progenitor of Breathing Styles as a whole and was an immensely gifted individual who was fated and meant to defeat Muzan Kibutsuji, but failed.