Isla is the 20-year-old ruler of the Wildling people. Deeply conflicted, she harbors a dark and overwhelming magic she desperately wishes to control, going so far as to commission power-restricting metal bracelets. She is bound to her husband Grimshaw to stay alive, but her heart is torn between him and the Sunling king, Oro. She is driven by a strong desire to protect those she loves and to atone for the destruction she has caused.

Grimshaw is the 500-year-old ruler of Nightshade. Known throughout the realms as a ruthless and fearsome warrior, his dark past under a cruel father stripped away much of his outward warmth. However, he is fiercely devoted to his wife, Isla, and prioritizes her safety above the expectations of his council and kingdom. He possesses dark magic and the ability to teleport.

Oro is the stern, golden-haired king of Sun Isle and the ruler of all Lightlark. Defined by his devotion and sense of duty, he contrasts sharply with his rival, Grimshaw. He loves Isla deeply and is willing to cross enemy lines to ensure her safety, even as she tries to push him away to protect him from a deadly prophecy.

Lark is an ancient, formidable Wildling and one of the creators of the world of Lightlark. She bears a striking physical resemblance to Isla, sharing the same green eyes and facial features. Driven by a desire for vengeance against those who wronged her centuries ago, she wields immense magical power and commands a deep connection to serpents.

Azul is the ruler of the Skylings. He is a steadfast ally to Isla, offering her guidance and practical assistance in the form of magical rings and a storm-sensing bird. He encourages Isla to forgive herself for past actions and tries to steer her back toward Lightlark and Oro.

Astria serves as Grimshaw's general. She is highly suspicious of Isla's loyalties to Nightshade, though the two women share a blood connection. She is a dedicated military leader who struggles to balance her distrust of the Wildling queen with her duty to her ruler.

Sairsha is a woman living in a Nightshade village who befriends Isla after being saved by her. She views Isla as a heroic vigilante and introduces her to a community of locals. She harbors quiet beliefs about a prophet's vision for the end of the world.

Terra is one of Isla's long-time Wildling guardians. She provides counsel and care to Isla, though their relationship is strained by past betrayals and lingering suspicions regarding the deaths of Isla's parents.

Poppy is Isla's other Wildling guardian. Like Terra, she has spent years watching over Isla but faces the young queen's growing distrust in the wake of political sabotage and desecrated graves.

Cleo is the ruler of the Moonlings. Grieving the loss of her child, she is determined to secure the oracles' prophecies for herself, caring little about the consequences her actions might have on Lightlark or the other realms.

The Augur is a skeletal figure with crimson eyes and pale skin covered in ancient runes. He trades glimpses of the future for the hearts of wicked men, delivering ominous warnings about Isla's survival and the location of magical portals.

Eta is a member of a secretive order that studies a deceased prophet's writings. She provides Isla with cryptic warnings about treacherous forces, snakes, and explains the nature of the destructive storms plaguing the island.

Wren is a Wildling who cares for serpents used to make medicinal remedies. She earns Isla's trust and is tasked with reporting any suspicious activity among their people.

Tynan is a disgruntled Nightshade soldier. He holds intense animosity toward Isla, blaming her for the realm's setbacks and plotting to eliminate her to resume the war against Lightlark.

Lynx is a leopard who shares a deep magical bond with Isla. He acts as her fiercely loyal protector and provides her with emotional support and shared memories through their unique connection.

Wraith is a fully grown black dragon bound to Grimshaw. He serves as a powerful mount, capable of navigating vicious storms and carrying his riders across vast distances.

Aurora, also known as Celeste, is a deceased Starling ruler who originally created the curses afflicting the realms. Though she is gone, her legacy and enchanted possessions continue to influence the magical world and Isla's decisions.

Cronan is the ancient, original ruler of Nightshade and one of Lightlark's founders. His burial site in the winter palace's hedge maze holds significant power that neutralizes surrounding magic.

Remlar is an ancient creature originating from the same world as Lightlark's founders. He possesses deep magical knowledge and offers to forge a cursed weapon to aid in the fight against a mutual threat.

Zed is a loyal guard and ally to Oro on Lightlark. He views Isla as a dangerous traitor to his king and reacts aggressively to protect his realm from her influence.

Isla's deceased father was once a commanding general in Grimshaw's army. He abandoned his military post and Nightshade completely when he fell in love with a Wildling woman, choosing a secluded life over a legacy of war.

Isla's deceased mother was a Wildling with the rare gift of foresight. She persuaded her husband to abandon his violent military life, choosing peace and love despite knowing the tragic cost her daughter's birth would bring.

Grimshaw's deceased father was a prior ruler of Nightshade. He was notoriously ruthless, training his son to abandon compassion entirely and murdering his other children to consolidate his own magical power.