* Daughter of Zeus: Thalia is the daughter of Zeus, the king of the gods, and a powerful demigod.
* Half-sister of Percy Jackson: Thalia is the half-sister of Percy Jackson, both being children of the Big Three (Zeus, Poseidon, and Hades).
* Hunter of Artemis: Thalia, after a traumatic experience involving her father Zeus, chose to join the Hunters of Artemis, a group of female demigods who renounce romance and dedicate their lives to the goddess of the hunt.
* The Pine Tree: In a desperate attempt to save her brother Luke and Percy from a monster, Thalia sacrificed herself and was turned into a pine tree by the god Hermes. This tree serves as a powerful barrier protecting Camp Half-Blood from monsters and evil forces.
* A symbol of hope and sacrifice: Thalia's story represents the strength and sacrifice demigods often endure. Her transformation into a tree symbolizes the enduring protection and legacy that demigods leave behind even in their absence.
* A source of inspiration: Thalia's choice to become a Hunter and her commitment to her friends inspires other demigods, especially Percy, to be brave and fight for what they believe in.
While not physically present for most of the story, Thalia's presence is felt throughout *The Lightning Thief* as a powerful figure of hope and sacrifice, guiding and protecting her brother Percy and the other demigods at Camp Half-Blood.