A 1500-year-old vampire, who is a brilliant scholar and scientist. He becomes involved with Diana and is initially interested in the magical manuscript Ashmole 782.

Matthew’s vampire mother who values family above all and is initially distrustful of Diana. Over time, Ysabeau’s attitude towards Diana softens.

Matthew’s vampire son, who is a skilled healer and scientist working alongside him. He becomes a leader within his community.

Diana’s aunt and a skilled witch, who is protective and somewhat skeptical of other supernatural creatures. She took care of Diana after the death of her parents.

A powerful and antagonistic wizard who is a member of the Congregation. He is determined to possess the magical manuscript and views witches as superior.

A daemon and a close friend of Matthew’s, who offers financial expertise with his supernatural abilities. He is emotionally stable for a daemon and holds a key role in Matthew's affairs.

A colleague of Matthew's in his genetics lab, who is cautious and initially disapproving of Diana. She provides a critical perspective on Matthew’s past.

Sarah Bishop’s partner, who possesses a powerful sixth sense and offers gentle support. She has a strong connection to Diana’s past and family secrets.

A daemon and part of the Congregation, who faces conflicts due to her family situation. She desires understanding and a future for her mixed-species family.

A daemon and the son of Agatha, who is protective of his family and focused on ensuring their safety. He joins forces to protect his family’s future.

A daemonic potter with visionary dreams, who fears persecution for her family. She seeks help to find a place for her abilities and heritage in the world.