Hypnos
Hypnos is a Spirit Family demon best known for being absolutely committed to sleep—we're talking 20 hours a day, every day. Princess Suya has basically declared him a master of the sleeping arts because of this. He's got a pretty chill lifestyle to match: he hangs around the Old Demon King Castle mostly because it's quiet there, which honestly makes sense if you're trying to sleep that much.
He's been around forever, too. Back when Tasogare, Poseidon, and Hades were just kids, Hypnos looked exactly the same as he does now—fans often note how timeless he seems. There's a story about him covering for the three when they accidentally smashed a statue while messing around, which is the kind of thing an older demon would do.
Content compiled by AnimeList.moe from publicly available sources.
