Envy is one of the seven Princes of Hell, deriving his power from mortals who indulge in his titular sin. He masquerades in the human town of Waverly Green as Lord Ashford Synton to locate a magical artifact needed to cure his deteriorating court. Beneath his arrogant, nonchalant public persona, he harbors a deep sense of responsibility toward his subjects.

Camilla is an independent artist and gallery owner managing her deceased father's estate. She possesses a unique magic that allows her to transcend worlds through her painting, a talent she hides from the restrictive, gossip-driven society around her. Isolated since her mother's sudden disappearance, she focuses entirely on protecting her father's legacy and providing for her household staff.

Lennox is the cruel and ageless King of the Unseelie Fae. He orchestrates complex, fatal games involving both humans and immortals to satisfy his grudges and alleviate his boredom. He rules the chaotic Wild Court and holds a specific, centuries-old hatred for the Princes of Hell.

Lord Vexley is the disinherited firstborn son of a viscount living in Waverly Green. He funds his lavish, scandalous lifestyle by blackmailing Camilla into forging expensive art. He treats people as possessions and actively uses the town's strict social rules against those who defy him.

Alexei is a royal vampire from Malice Isle who operates as Envy's second-in-command. He originally joined Envy's household to study leadership but developed genuine loyalty to the demon prince, preferring to serve in the Underworld rather than rule among vampires.

Commonly known as Zarus, Prometheus is the cruel prince of the vampires on Malice Isle. He actively provokes war with the demon courts and accepts dark bargains to expand his influence over the Underworld factions.

Blade is a high-ranking noble in the vampire court on Malice Isle. He stands out among royal vampires due to his crimson eyes, and he operates carefully within the violent political structure of his home.

Vittoria is the Goddess of Death and a powerful resident of the Underworld. She operates with her own hidden agendas, frequently inserting herself into the affairs of the demon princes to secure advantageous bargains and political leverage.

Wrath is the king of the Underworld and Envy's brother. He prioritizes the stability of the Seven Circles over personal vendettas, a pragmatic stance that often causes friction with his more volatile siblings.

Emilia is the Goddess of Fury and the wife of Wrath. She is a stabilizing force in the Underworld and maintains a friendly, supportive relationship with Envy, occasionally providing him with magical assistance.

Sloth is one of the Princes of Hell, residing in a vast, library-like court filled with historical records. He is highly organized and observant, quickly recognizing the unique nature of Camilla's resistance to demonic influence.

Pride is a Prince of Hell who masks his centuries-long grief behind a mocking, arrogant exterior. He wanders the Underworld and mortal lands searching for his lost wife, taking out his frustrations through petty rivalries with his brothers.

Lust is a Prince of Hell who views romance and desire as entertaining games. He enjoys pushing his brothers' boundaries and actively tries to complicate Envy's strict rules regarding relationships.

Gluttony is one of the seven Princes of Hell. He frequently wagers on the romantic and political exploits of his siblings, viewing their struggles as a source of personal entertainment and profit.

Greed is a Prince of Hell who rules over his own circle of the Underworld. Along with his brothers, he participates in the complex, competitive family dynamics that define the demon royalty.

Lady Katherine is a wealthy socialite in Waverly Green. She uses her position to gather intelligence on the town's elite and frequently helps Camilla avoid the ruinous consequences of public scandal.

Pierre was a famous human artist and nobleman in Waverly Green. After his wife's sudden disappearance, he became obsessed with uncovering the secrets of the Fae, leaving his daughter with a complicated legacy and a deep well of magical knowledge.

Prim Róis is the former Queen of the Unseelie Court who caused massive political upheaval by abdicating her throne. Her motives remain mysterious, leaving behind only a protective locket to shield her daughter from Fae influence.

Wolf is an Unseelie Fae operative who frequently crosses paths with Camilla. He acts as a messenger and provocateur, using his knowledge of Fae history to push Camilla toward accepting her heritage.