Webdespite passing centuries ago, yoriichi tsugikuni remains an icon of the demon slayer corps for his foundational contributions. As the first breath of the sun. Webyoriichi tsugikuni (็นผๅœ‹ ็ทฃๅฃฑ?) is the overarching protagonist of the demon slayer:

He was the creator of the first breathing style, the sun.