 In "The Last Olympian", she and Percy start a romantic relationship.She appears in "The Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of the Labyrinth, The Last Olympian, The Lost Hero, The Son of Neptune, The Mark of Athena, The House of Hades" and "The Blood of Olympus".In the film adaptations, she is portrayed by Alexandra Daddario.