The manga of Demon Slayer is over, and the anime will ... and brother to the strongest human in the series, Yoriichi. Kokushibo’s sword is called Kyokokukamusari and it is made from his living ...

This was before he met Yoriichi Tsugikuni, a powerful Demon Slayer who nearly killed him. Ever since then, Muzan has been fearsome of Yoriichi and his Sun Breathing. Even though Muzan was ...

This breathing style is later shown to be used by the most powerful Demon Slayer in history, Yoriichi. Tanjiro also carries a piece of Yoriichi wherever he goes in his Hanafuda earrings.