Enjuro Rengoku (煉獄 炎柔郎 Rengoku Enjūrō) is a friend of Yoriichi. He is a Demon Slayer of the Demon Slayer Corps and the first Flame Hashira (炎柱 En Bashira). He’s greatly enthusiastic regarding his duties as a Hashira and often came across as cheerfully eccentric. He is amiable, pure of heart, and boasted extraordinary technique and swordsmanship stemming from strict practice and discipline. He is 20 years old.