Percy Jackson in The Lightning Thief book, analysis of Percy Jackson. To see this text, hit the "Expand" link to the right. Annabeth, Percy, and Thalia enter a school looking for two demigods that Grover had been looking after. Suitable for more mature TEENen, 9 years and older, with minor action violence without serious injury. May contain mild coarse language. Should not contain any adult. Annabeth Chase; Percy Jackson & the Olympians & Heroes of Olympus character: First appearance: The Lightning Thief: Last appearance: The Hammer of Thor: Created by.