If you surf fandom spaces as much as I do, the usual suspects from 'Obey Me!' pop up everywhere: Lucifer, Mammon, Leviathan, Satan, Asmodeus, Beelzebub, and Belphegor. Lucifer tends to top a lot of lists because of that cool, composed big-bro vibe and the way his route and lines let people lean into protective or melancholic headcanons. Mammon is everywhere too—he's chaotic, needy, and somehow deeply endearing, which makes him a cosplay and meme favorite.
Leviathan and Satan have huge followings for different reasons: Levi for gamer/otaku energy and emotional boss fights, Satan for the bookish, snarky type that fans adore. Asmodeus and Beelzebub get love for style and gentle gluttony, while Belphegor hits that sleepy, tsundere niche. Diavolo and Luke round things out among side characters who've also grown popular thanks to event stories and extra content.
I personally gravitate toward the characters whose sprites and event lines made me laugh late at night—Mammon’s panic texts, Leviathan’s streaming rants, and Lucifer’s quiet lectures stick with me. Popularity isn’t just inherent; it’s built by voice acting, special illustrations, fanart trends, and the moments the game gives us to ship or comfort them. If you wander through fanart tags, you’ll see how these traits blow up into whole microcultures for each character.