Breen is a 26-year-old middle school teacher who feels anxious and stifled by her life in Philadelphia. After discovering a hidden inheritance, she travels to Ireland in search of her father and her true identity. She possesses latent powers, including the ability to influence plant growth and generate light, and loves creating things through writing and gardening.

Marg is one of the Fey, also known as the Wise, and a former Taoiseach (chieftain) of Talamh. She is a powerful witch who uses her abilities to heal and defend her pastoral world. Maternal and deeply supportive, she guides Breen's transition into the world of magicks while understanding the grave danger her granddaughter faces.

Keegan is the current Taoiseach and sworn protector of Talamh. He rides a dragon and bears a heavy burden of leadership, prioritizing the safety of his world above all else. Straightforward and demanding, he pushes Breen relentlessly in her physical combat training to ensure she can survive looming threats.

Marco is a gay, Black bartender and Breen's deeply devoted best friend. He provides the emotional support and encouragement Breen lacks from her biological mother, urging her to embrace her true self and travel to Ireland. He is expressive, musical, and fiercely protective of his chosen family.

Odran is a powerful, dark god and Breen's biological grandfather. He was cast out of Talamh by Marg after performing blood sacrifice to increase his power. He poses a continuous threat to both Talamh and the human world, seeking to absorb Breen's unique inherited magicks to fuel his conquests.

Jennifer is a successful media director for a major Philadelphia advertising firm and Breen's mother. She has spent years hiding an inheritance from Breen and steering her daughter into safe, unfulfilling life choices. Her actions stem from a deep fear of the supernatural world her former husband belonged to.

Eian is Breen's late father, remembered by his daughter for telling her fantastic stories of magical places. A former musician who frequently traveled, he also held immense responsibility as a warrior and leader in Talamh. He struggled to balance his duties to his people with his love for his family in Philadelphia.

Sally is a nurturing drag queen who owns and operates a club in Philadelphia. Acting as a surrogate parent to both Breen and Marco, Sally provides a loving, safe environment that contrasts sharply with the judgment Breen receives from her biological mother.

Sedric is a "were" who can shift into the form of a cat. He acts as Marg's life partner and serves as an unseen guardian for Breen, using subtle influence in the human world to help her discover the hidden investment account that funds her journey to Ireland.

Morena is a member of the Sidhe, a winged faerie clan. She initially appears to Breen as a mysterious falconer in Ireland before properly introducing her to the world of Talamh. She is a childhood friend of Breen's who seamlessly traverses the portal between the two settings.

Finola is a mature, wise member of the Sidhe who tends to the earth, air, and growing things. She manages Fey Cottage in Ireland and maintains a close, long-standing friendship with Marg.

Seamus is a gardener who maintains the grounds at Fey Cottage. He teaches Breen about local plants and helps her discover her latent ability to influence growing things through her touch.

Harken is Keegan's brother who helps run things in Talamh. He assists in caring for his sister's children and is intimately involved with Morena.

Aisling is Keegan and Harken's sister. She is a mother and a healer in Talamh who assists Breen in learning healing spells.

Yseult is a dark faerie loyal to Odran. She attempts to kidnap Breen by using venomous snakes to induce a deadly sleep, acting as an agent for the dark god's will.

Shana is a woman living in the Capital of Talamh whom Keegan visits for physical intimacy. She hopes to become his partner, but Keegan ultimately breaks off their connection.