@Joron he seems to know angels since a long time as he knew the demon king and said to boom oni to ”say hello for him” to the other side. Might be an angel or a demon or something like Frau.
Huh, some big reveals this chapter. Not only is Imperial Oni from heaven, but Boom Oni is still alive? And Cobb might become a good guy now? I wonder if they're gonna join up with the party at some point?
Alright! With every sudden new (somewhat interesting) character appearance and their plot armor. With this, I'm certain that this manga feels like Yuusha ga Shinda! minus the ecchi.