Jet is an octogenarian bloodline witch and healer who lives in the family house on Magnolia Street with her sister, Franny. A dedicated reader whose favorite author is Emily Dickinson, she uses her inherent magical abilities and the family grimoire to cure her neighbors' physical and emotional ailments. She maintains a deeply hidden romantic life to protect those she cares about from the deadly Owens family curse.

Franny is an octogenarian bloodline witch known for her cool demeanor and practical nature. Following the death of her nieces' parents, she raised Sally and Gillian alongside her sister, Jet. Having lost her husband to cancer, she structures her life around her fierce, protective love for her family while outwardly maintaining a stone-hearted facade.

Sally is a 44-year-old bloodline witch who works as the director of the Owens Library in Massachusetts. Having been widowed twice by the family curse, she adamantly rejects her inherent magical abilities and refuses to teach her daughters about their legacy. She is practical, curt, and longs for a normal existence free from supernatural burdens.

Gillian is Sally's 43-year-old sister who works in a genetics lab at MIT. Unlike Sally, Gillian embraces the family's magical legacy and longs to increase her bloodline powers. She possesses immense charm and beauty, which often causes men to become infatuated with her, though she keeps her true romantic life carefully hidden.

Kylie is Sally's youngest daughter, a sensitive university sophomore studying classics. Having been kept completely ignorant of the family's magical bloodline and the curse, she is highly susceptible to emotional distress. Her desperate need to protect her beloved leads her to seek out dangerous, left-handed magic without understanding the consequences.

Ian is a 50-year-old occult scholar, writer, and former Oxford professor. Having spent time in prison during his youth where he gained 19 occult tattoos, he now investigates and removes black magic for a living. He relies entirely on studied knowledge rather than inherent bloodline powers.

Thomas, often called Bad Tom, is a practitioner of left-handed (black) magic living near the ruins of Lockland Manor in Thornfield. Harboring a deep resentment toward the village that ostracized his family, he seeks revenge and destruction. He uses his knowledge of poisons and curses to manipulate vulnerable people.

Antonia is Sally's 23-year-old daughter, a highly intelligent woman studying emergency medicine. Because her mother was often distracted by grief, Antonia grew up as the practical, responsible sibling who managed family obligations. She is pregnant with the help of a close friend and relies on science, initially viewing the family curse as mere superstition.

Vincent is Franny and Jet's brother, a former famous musician who faked his death to live quietly in Europe and avoid the family curse. He possesses a specific magical gift for finding lost things and people. Haunted by the death of his partner, he is drawn back into the family's orbit when they require his unique skills.

Margaret is Ian's mother, a lifelong resident of Essex, England. She is a cunning woman who practices the Nameless Art, which involves healing green magic learned through study rather than genetic inheritance. She uses her extensive knowledge of magical texts to create cures for her community.

Gideon is a university student and Kylie's childhood friend turned romantic partner. After a tragic accident places him in a coma, his medical condition serves as the catalyst for Kylie's desperate search into left-handed magic and the family's rush to break the ancestral curse.

Ariel is the fierce attorney managing the Owens family estate. She is undaunted by the rumors of the family's curse or their haunted history, believing that danger is simply a normal part of the human condition.

David is the 74-year-old librarian at London's highly exclusive Invisible Library. A former British Museum employee, he possesses extensive academic knowledge of magic but lacks inherent powers. He carries profound guilt over a past attempt to use dark magic to save his late daughter.

Rafael is a retired high school principal who previously worked as a bellhop at the Plaza Hotel, where he saved a young Jet's life. He maintains a decades-long, heavily concealed relationship with Jet to protect himself from the deadly Owens curse.

Ben is a science teacher and Gillian's husband. To survive the deadly Owens family curse, he and Gillian maintain separate apartments and never officially record their marriage, keeping their deep affection hidden from the world.

Reverend Willard is a 100-year-old man living in a local nursing home. Decades ago, he forbade the relationship between his son, Levi, and Jet. Despite this painful history, he maintains a close connection with the Owens women in his final years.

Miss Hardwick is a librarian who assists Sally in managing the Owens Library. She enjoys dressing up as literary characters and keeps careful watch over the rare book room, noting the dangerous nature of certain occult texts.

Maria is the matriarch of the Owens family who originated their bloodline magic in America. Heartbroken and betrayed in the 1600s, she cast the enduring curse that dictates any man loved by an Owens woman will die, leaving behind a locked box of secrets.