Kyojuro Rengoku (煉れん獄ごく 杏きょう寿じゅ郎ろう Rengoku Kyōjurō?) is a major supporting character of Demon Slayer: Kimetsu no Yaiba and a major character in the Mugen Train Arc. She is a Demon Slayer of the Demon Slayer Corps and the Flame Hashira (炎えん柱ばしら En Bashira?). (You can be your own original Hashira.)