Nine realms of Hell.
Six demon princesses.
A dozen demon gods at war.
Meet the Ronove sisters, daughters to the Queen of the Ninth Realm of Hell. They're going to trigger a war between the demon gods that'll shake up Heaven, Hell, and every dimension in between, and make them very unpopular—even with those they fall in love with.
Glasayn "the Learned"
Lymenia "the Furious"
Vanth "the Vigorous"
Semenia "the Voracious"
Clarovar "the Corrupter"
Faramin "the Betrayer".
The Vor twins, Astaroth and Valefar.