Eros, the son of Aphrodite, works as a fixer for his mother and grapples with the moral implications of his actions. He is deeply intertwined with Psyche's journey and experiences growth through their evolving relationship.

Persephone, Psyche's older sister, is a loyal and supportive sibling and one of the protagonists of a previous book in the series. She is protective of Psyche, although initially wary of Psyche's sudden decisions.

Aphrodite, mother of Eros, is an influential figure in Olympian society known for her manipulative and jealous nature. She plays a pivotal role in creating conflict for both Psyche and Eros through her schemes.

Demeter, a member of the ruling Thirteen, is ambitious and strategic, particularly concerning her daughters' futures. She is calculating but also shows moments of support for her daughters' decisions.

Perseus, the current Zeus, is a young and stern leader balancing personal relationships with his political responsibilities. He has a complex history with Eros and is integral to the political dynamics of the story.

Callisto, the oldest Dimitriou sister, is known for her fierce loyalty and determination. Her strong personality and willingness to protect her siblings play a significant role in the family dynamics.

Helen, Perseus's younger sister, is a close friend of Eros and a loyal ally to him and Psyche. Her influence and connections are crucial in shaping events, and she maintains a firm stance during conflicts.