Description for Rurgatory. The “Rengoku” isn’t just a character from the manga or anime.
One refers to the place or state
In Christian doctrine, the place and state where souls who have committed venial sins—not severe enough to warrant hell but not yet worthy of heaven—undergo purification through suffering while awaiting the Last Judgment. Also called the Purgatorial Realm.
While the Bible contains no explicit descriptions of purgatory, it was posited by Latin Church Fathers such as Augustine and Gregory I based on interpretations of texts like the apocryphal Book of Maccabees in the Old Testament and the Gospels of Matthew and Luke in the New Testament.
In Latin: purgatorium
Another meaning is a Japanese surname.
While no Japanese person currently bears this surname, it is the surname of a character in the manga and anime Demon Slayer: Kimetsu no Yaiba. This character is one of the captains of the Demon Slayer Corps and specializes in fire techniques.
