Board Thread:General Discussion/@comment-30741044-20181012234344/@comment-2600:1702:2380:3540:D448:F423:3651:3FB1-20190414164534

Since the demon lord converted all of the monsters into mamono, this probably means that a good deal of mamono were once serial killers. I can see two possibilities here: they completely ignore their past actions, or they're contantly weighed down by guilt. And even worse: if their husband was related to one of their victims, he'll possibly be reminded of his family's deaths.