Lyra Keres is the protagonist and primary narrator of the novel. A dynamic, round character, she evolves from a cursed, cynical thief into a powerful goddess who controls the fabric of time. Initially defined by her resourcefulness and her tendency to fight first and think later, Lyra’s defining trait is a fierce, often reckless, loyalty to those she cares for. When dragged into Tartarus, her first reaction is a desperate need to reunite with Hades. However, she quickly adapts to her new, hostile environment. Applying the survival instincts she honed in the Order of Thieves, Lyra learns to navigate the treacherous landscape of the underworld prison and its complex inhabitants.

Lyra’s worldview is continually challenged as she discovers the truth about the mistreatment of the Titans, forcing her to confront the lies that have shaped history. This external conflict mirrors her internal one, as she grapples with the trauma of her past, including her parents’ abandonment and Zeus’s curse of being unlovable—incidents which have fostered a deep-seated distrust and a belief in her own worthlessness. Cronos observes her combative nature early on, murmuring, “You are always so quick to fight” (6). This trait serves her well in physical altercations but also reveals her defensive stance toward emotional vulnerability.