Nesta is the 25-year-old eldest sister of the Archeron family, forcibly changed into a High Fae by a primordial magical object. She struggles with intense trauma, guilt, and self-loathing, which she masks with a sharp tongue, gambling, and heavy drinking. To stop her downward spiral, her family sends her to an isolated mountain estate to undergo rigorous martial arts training.

Cassian is a battle-hardened Illyrian warrior and the commanding general of the Night Court's armies. Born a commoner, he has risen to greatness alongside his closest friends through sheer physical prowess and strategic mind. He is tasked with keeping Nesta out of trouble and coaching her through a rigorous physical training regimen, despite their frequent clashes.

Rhysand is the incredibly powerful High Lord of the Night Court. He is determined to maintain a fragile peace between the Fae and human territories while dealing with political unrest across the continent. He relies heavily on his inner circle to keep his court safe and functioning.

Feyre is the youngest Archeron sister and the High Lady of the Night Court. Having previously carried the burden of providing for her human family, she now rules alongside her husband. She initiates the intervention to save her oldest sister from self-destruction, though her efforts are met with hostility.

Briallyn is one of the human queens who sought immortality. As punishment for the power Nesta stole, the Cauldron turned Briallyn into an immortal crone rather than a youthful Fae. She now harbors a deep desire for revenge and ultimate power.

Koschei is an ancient sorcerer bound to a lake on the continent. Unable to free himself from his binding spell, he continuously seeks a way out of his predicament and schemes with human queens to gain power.

Elain is the 23-year-old middle Archeron sister. Like Nesta, she was forcibly turned into a Fae by a magical artifact, but she has adapted more quietly, finding solace in cultivating the palace gardens. She is soft-spoken and frequently acts as a buffer between her two headstrong sisters.

Gwyn is a young priestess working in the court library beneath the House of Wind. A survivor of severe wartime atrocities, she hides from the outside world within the safety of the sanctuary. She assists a scholar researching ancient female warriors and begins to form a tentative friendship with Nesta.

Emerie is an Illyrian shopkeeper running a store in Windhaven. As a female in a deeply misogynistic society, she faces constant prejudice and cruelty, including having her wings clipped by her own father to prevent her from flying.

Azriel is the Night Court's lethal spymaster and the third member of Rhysand's closest brotherhood. He possesses shadow magic and is tasked with gathering intelligence on the growing threats from the human queens and other enemies.

The Cauldron is an ancient, sentient source of primordial magic that possesses the power to create beings and objects. It holds a lingering anger toward Nesta for stealing some of its power during her forced transformation.

Eris is the eldest son and heir to the Autumn King. He is an arrogant and calculating courtier who despises his father. He plays a dangerous political game, acting as an informant for the Night Court while maintaining his position in his father's hostile court.

Amren is the chief advisor to King Rhysand and an ancient, formidable being in the Night Court. Once close with Nesta, she has lost patience with the eldest Archeron sister's self-destructive spiral and is highly critical of her behavior.

Mor is the third-in-command and seer of the Night Court. She functions as a diplomat and frequently transports other court members between locations. She is highly trusted by Rhysand and Cassian.

Clotho is the High Priestess of the library beneath the House of Wind. Like many priestesses, she suffered horrific abuse during the war, resulting in her hands being shattered and her tongue cut out. She communicates through writing and oversees Nesta's library duties.

Merrill is a bad-tempered and demanding scholar working in the House of Wind's library. She is conducting extensive research on the legendary, extinct race of female warriors known as the Valkyries.

Beron is the harsh and ambitious Autumn King. He is secretly aligning himself with human threats to start another war and overthrow the existing Fae peace treaties.

Bellius is an arrogant and abusive Illyrian male from the mountain camp of Windhaven. He represents the deeply ingrained misogyny of his culture and frequently torments his female relatives.