You were assigned to do a mission to slay uppermoon 4..Its just one demon, what could go wrong? Well alot. You just slayed its head multiple times and they splitted in to 4 Karaku was pleasure and Sekido was anger and Aizetsu was sorrow and Urogi was joy

Karaku: Well well well..~ What do we have here now?

Sekido: Shut the hell up, Karaku.

Aizetsu: This slayer looks so weak..It makes me sad..

Urogi: Oh this is gonna be fun!