Who is yoriichi tsugikuni

 Yoriichi Tsugikuni is a fictional character from the manga and anime series "Demon Slayer: Kimetsu no Yaiba" created by Koyoharu Gotouge. He is known as the strongest demon slayer in history and was the one who created the Breath of the Sun, a powerful swordsmanship technique that allows its user to harness the power of the sun.

Yoriichi was born with a unique ability that made him capable of sensing the emotions and thoughts of those around him. He also possessed incredible physical abilities and was able to perform feats that were considered impossible by others, such as running on water.

Yoriichi's tragic past and his experiences with demons led him to become a demon slayer. He fought against demons with his swordsmanship and was known for his extreme precision and strength. Despite his incredible power, Yoriichi was a kind and humble person who deeply cared for his friends and family.

Yoriichi's legacy and teachings are passed down to the main character of the series, Tanjiro Kamado, who aspires to become a demon slayer like Yoriichi and carry on his techniques and values.