The Nine Lords of Hell
- Bel: Archdevil and lord of Avernus, the first layer of Hell.
- Dispater: The Father of Strife, and an archfiend who rules Dis, the second layer of Hell.
- Mammon: The King of Greed, an archdevil who lords over Minauros, the third layer of Hell.
- Fierna: An archdevil who rules Phlegethos, the fourth layer of Hell.
- Levistus: An archdevil imprisoned in Stygia -- the fifth layer of Hell over which he is lord -- by Asmodeus for slaying Asmodeus' first consort.
- Glasya: Asmodeus' daughter, she is an archdevil who rules Malboge, the sixth layer of Hell.
- Baalzebul: The lord of flies and the archdevil in charge of Maladomini, the seventh layer of Hell.
- Mephistopheles: An archdevil who rules Cania, the eighth layer of Hell.
- Asmodeus: The evil god of tyranny and domination, patron of devils and ruler of Hell from Nessus, the ninth layer of Hell.
- Adonides: The steward of Cania.
- Alloces: Joined Asmodeus late, but quickly rose to become chief inquisitor.
- Alastor: Asmodeus' executioner.
- Amon: A powerful pit fiend who served Levistus.
- Assailra: Ruler of Malharak, a border island of Hell.
- Azazel: An archdevil dwelling in Avernus.
- Baalberith: Asmodeus' chancellor.
- Barbatos: Baalzebul's marshal.
- Beleth: Prince of imps, and spymaster for Glasya.
- Belphegor: Warden of the hellfire beneath Mephistopheles' palace.
- Belial: The archdevil and father of Fierna.
- Bifrons: Commander of a legion of ice devils in Cania.
- Bivant: An archdevil dwelling in Dis as its Provost.
- Focalor: Mammon's seneschal
- Geryon: Once the ruler of the fifth level of Hell, until he opposed Asmodeus and was overthrown, to be replaced by Levistus.
- Islin: Queen of the Shores of Sorrow, one of Hell's Border Islands.
- Lenphant: The true ruler of Grenpoli, Baalzebul's City of Guile.
- Lilith: Baalzebul's consort and an archdevil. Described in Ecology of the Succubus.
- Malagarde: An archdevil and manipulator who stilled a civil war amongst the devils.
- Martinet: Asmodeus' constable.
- Moloch: An archdevil exiled from Hell for trying to overthrow Asmodeus.
- Mysdem: The titular head of Grenpoli, Baalzebul's City of Guile.
- Naome: Belial's consort.
- Nebaz: Baalzebul's Herald of Lies.
- Nergal: An archdevil dwelling in Avernus.
- Nuncio: An archdevil of the Iron Tower, dwelling in Dis.
- Phongor: Asmodeus' inquisitor.
- Raamoth: An archdevil dwelling in Avernus.
- Sagirsa: An archdevil who rules the city of Jangling Hiter in Minauros.
- Strezgaz: The Crackling, and co-ruler of the Fair Trade Islands orbiting Hell.
- Svidanfi: The Queen of assassin devils, and co-ruler of the Fair Trade Islands orbiting Hell.
- Tartash: High Marshal of Malboge and chief lieutenant of Glasya.
- Titvilus: An archdevil dwelling in Dis.
- Tymphal: An archdevil in Phlegethos, a mechanical genius.
- Veris: The Weeping One, and ruler of Hell's Border Island, Screamstone.
- Virginian: The Virile, and also the Vile, lord of the Fair Trade Islands orbiting Hell.