Yoriichi

Yoriichi Tsugikuni is a central character in the anime Demon Slayer: Kimetsu no Yaiba. He was a Demon Slayer who lived during the Sengoku era, nearly 500 years ago, and is considered the most powerful Demon Slayer in history. Abilities: Born with the Demon Slayer Mark, Yoriichi possessed immense physical abilities, including strength, speed, stamina, and reflexes. He also had access to the Transparent World and Selfless State, and was a natural swordsmanship prodigy. Nichirin Sword: Yoriichi was the first to turn his Nichirin Sword bright red, allowing him to burn demons at a cellular level and hamper their regeneration. Sun Breathing: Yoriichi invented Sun Breathing, the most powerful Breathing Style, and perfected its forms into the Thirteenth Form, which he used to overpower Muzan. Lifespan: Yoriichi lived to be around 85, defying the fate of most Mark bearers who die before 25. His immunity to the Mark's effects is likely due to being born with it. Legacy: Yoriichi taught Sun Breathing to Sumiyoshi, who ultimately played a role in Muzan's demise. Yoriichi's backstory is connected to the main villain, Muzan, and helped shape the world of Demon Slayer.