Rengoku Kyojuro is a pillar of the Demon Slayer Corps in the anime and manga series Demon Slayer. Known for his gallant demeanor, Rengoku is an exceptionally skilled swordsman with a powerful breathing technique. Possessing an unwavering sense of justice and profound empathy, Kyojuro is admired by many and devotes his life to combating demons. He is the son of Rengoku Senjuro and strives to uphold the values of the Flame Hashira, often shown wearing an exuberant smile. His warm presence and dedication to his mission have earned him both friends and a respected reputation among his peers. Despite his optimistic outlook, he harbors a deep sorrow for his inability to save others.