All-Seeing Eye—Godly artifact with the power to see into heaven and hell
Amun—Keeper of Secrets
Anya—(Minor) Goddess of Anarchy
Ashlyn Darrow—Human female with supernatural ability
Atlas—Titan god of Strength
Baden—Keeper of Distrust (deceased)
Bait—Human females, Hunters' accomplices
Bianka Skyhawk—Harpy; sister of Gwen and consort of Lysander
Cage of Compulsion—Godly artifact with the power to enslave anyone trapped inside
Cameo—Keeper of Misery
Charon—Gatekeeper to hell; guardian of the River Styx
Cloak of Invisibility—Godly artifact with the power to shield its wearer from prying eyes
Cronus—King of the Titans, keeper of Greed
Danika Ford—Human female, target of the Titans
Dean Stefano—Hunter; right-hand man of Galen
dimOuniak—Pandora's box
Galen—Keeper of Hope
Gideon—Keeper of Lies
Gilly—Human female, friend of Danika
Greeks—Former rulers of Olympus, now imprisoned in Tartarus
Gwen Skyhawk—Half-Harpy, half-angel
Haidee, aka "Ex"—immortal Hunter; formerly Bait
Heavenly High Council—Angelic governing body
Hera—Queen of the Greeks
Hunters—Mortal enemies of the Lords of the Underworld
Kaia Skyhawk—Harpy; sister of Gwen
Kane—Keeper of Disaster
Legion—Demon minion, friend of Aeron
Lords of the Underworld—Exiled warriors to the Greek gods who now house demons inside them
Lucien—Keeper of Death; leader of the Budapest warriors
Lucifer—Prince of darkness; ruler of hell
Lysander—Elite warrior angel and consort of Bianka Skyhawk
Maddox—Keeper of Violence
Mnemosyne—Titan goddess of Memory; sister of Rhea and mistress of Cronus
Olivia—An angel
One True Deity—Ruler of the angels and head of the Heavenly High Council
Pandora—Immortal warrior, once guardian of dimOuniak (deceased)
Paring Rod—Godly artifact, power unknown
Paris—Keeper of Promiscuity
Reyes—Keeper of Pain
Rhea—Queen of the Titans; estranged wife of Cronus; keeper of Strife
Sabin—Keeper of Doubt; leader of the Greek warriors
Scarlet—Keeper of Nightmares
Sienna Blackstone—Deceased female Hunter; new keeper of Wrath
Strider—Keeper of Defeat
Tartarus—Greek god of Confinement; also the immortal prison on Mount Olympus
Titans—Current rulers of Olympus
Torin—Keeper of Disease
Unspoken Ones—Reviled gods; prisoners of Cronus
Warrior Angels—Heavenly demon assassins
William—Immortal warrior, friend of Anya
Zeus—King of the Greeks