Alciel
A demon general who showed up with Olba to take down Maou and Emi, though that plan didn't exactly work out—he got his ass handed to him instead. After the loss, he basically moved into Maou's apartment and never left, becoming a full-blown NEET. He's surprisingly tech-savvy and spends most of his free time gaming, which honestly tracks for someone with no job and nowhere else to be.
Content compiled by AnimeList.moe from publicly available sources.
