In "Sea of Shadows" by Kelley Armstrong, the story centers around a captivating character who is intrinsically connected to the night. This character, known as the Keeper, embodies the essence of darkness and serves as a guardian figure. She is often seen as a bond-mate to a mystical cat, indicating a deep interconnection between them that transcends the ordinary. The title "Daughter of the Moon" symbolizes her affiliation with lunar powers, linking her fate to the mysterious forces that govern the night.

The narrative explores themes of protection, loyalty, and the duality of darkness and light. The Keeper’s role is not just one of guardianship but also of a deep-seated bond with her surroundings, highlighting her unique position within the realm she inhabits. As a protector of the night, she represents a powerful figure that balances the primal instincts of nature, ultimately shaping the story’s exploration of shadowy realms and ethereal connections.