You don’t have to be an immortal soul-devouring demon to work here... but it helps!
From the introduction:
So you died. Big deal. It wasn’t actually all that bad. You had a lot of sin on your soul, though. You were supposed to go straight to The Eternal Hell of Biting Fangs or the Hell of Crushing Stones or someplace. Somewhere that unspeakable monstrosities would rip your soul apart and feast on its dripping pieces for all eternity.