Shinjurou Rengoku

Shinjuro Rengoku (煉 (れん) 獄 (ごく) 槇 (しん) 寿 (じゅ) 郎 (ろう) , Rengoku Shinjurō) is the father of Kyojuro Rengoku and Senjuro Rengoku and the husband of Ruka Rengoku. He formerly served as the Flame Hashira (炎 (えん) 柱 (ばしら) , En Bashira) of the Demon Slayer Corps.