* AdaptationDisplacement: These books are virtually unknown outside of Japan, and even then, they're pretty niche. Compare that to ''Franchise/ShinMegamiTensei'', the franchise (initially) based off said books.
* EvilIsSexy: Loki's descriptions liken him to a bronze Greek statue.
* NightmareFuel: The lovingly detailed descriptions of what Loki does to people. And how he eats.
** Nakajima. He summoned a deity-class demon with his program, sure, but he also neglected to include little details like the duration of the summoning, compensation, and conditions...
** [[spoiler:Ohara]] has this as well. When [[spoiler:Loki]] is defeated, she freaks out, and fiddles with the Demon Summoning Program, something she doesn't understand and can barely operate. She ends up summoning [[spoiler:Set]].