Yoriichi Tsugikuni

Yoriichi Tsugikuni is one of the most important and powerful characters in Demon Slayer: Kimetsu no Yaiba, created by Koyoharu Gotouge. Age: 24 Yoriichi Tsugikuni was a legendary Demon Slayer who lived nearly 500 years before the main story. He is widely considered the strongest Demon Slayer in history. He was born during the Sengoku era and was the twin brother of Kokushibo (originally named Michikatsu Tsugikuni), who later became one of the most powerful demons. Created the original Sun Breathing technique (the first and strongest Breathing Style). Is the ancestor of all other Breathing Styles (Flame, Water, Stone, Thunder, Wind, etc.). Wore distinctive Hanafuda earrings, which later connect him to Tanjiro. Sun Breathing is the foundation of the technique used by Tanjiro Kamado. Yoriichi was born with: The Demon Slayer Mark. The rare ability called the Transparent World. Extraordinary swordsmanship talent from childhood. Weapon: Yoriichi wields a unique Black Nichirin Katana that turns into a Bright Red Nichirin Sword during combat. As the strongest Demon Slayer in history, his mastery of Sun Breathing and his natural physical prowess allow him to heat the blade to a crimson hue, which completely negates demon regeneration on a cellular level. He was so powerful that he nearly killed Muzan Kibutsuji, the first and strongest demon. Muzan feared him so deeply that his trauma from that battle lasted for centuries. Despite his strength: His wife and unborn child were killed by demons. His brother grew jealous of his talent and eventually became a demon. Yoriichi died of old age while standing, undefeated in battle. Even Muzan admitted Yoriichi was in a completely different league from everyone else. Yoriichi’s legacy drives the entire story: His techniques influence Tanjiro’s growth. His brother becomes a major antagonist. Muzan’s fear of him shapes the demon world.