Thalia Grace is the Greek demigod daughter of Zeus and the sister of Jason Grace. She was transformed into a pine tree on Half-Blood Hill, which still stands as the official border for Camp Half-Blood to this day. Later she was revived with the Golden Fleece. She is currently the lieutenant of the Hunters of Artemis. Recently featured: The Demigod Diaries | Dionysus | Polyphemus | Prometheus | The Battle of the Labyrinth |