Annabeth Chase
In the final book, Annabeth first appears when Percy returns from blowing up Kronos's ship, the Princess Andromeda. Following his arrival, Annabeth helps Percy hear the Great Prophecy. Percy bathes in the River Styx (he narrowly escapes by imagining Annabeth pulling him out of the river) and calls Annabeth, telling her to meet him in front of the Empire State Building with all the demigods from Camp Half Blood. When Annabeth and Percy go to Olympus, they meet Hermes, to whom Annabeth tries to apologize about Luke turning into Kronos. Hermes becomes angry at her and blames her for not saving Luke. Hermes leaves, and they return to the other campers to defend Manhattan and Mount Olympus. In battle, Ethan Nakamura attempts to stab Percy in the small of his back, his Achilles spot, and Annabeth jumps in front of him, taking the knife. After a few hours of rest, Annabeth, though still weak from poison, goes back into battle. Kronos goes to Olympus, and Grover, Thalia, Percy, and Annabeth follow him. Kronos attacks Percy, and Annabeth joins the fight, but is knocked out of the fight when Kronos slams her into Athena's throne. In the end, she saves Percy and Olympus by finally realizing the prophecy's true meaning. She convinces Percy to give Luke her knife (which was given to her by Luke when she was seven) so he can stab himself, killing himself and banishing Kronos to Tartarus yet again. She is rewarded by the gods, who allow her to use her talents as an architect to rebuild Mount Olympus. Percy Jackson refuses immortality because of his feelings for Annabeth. At Camp Half-Blood in the dining hall later that day, Annabeth kisses Percy after he admits his feelings for her. She warns him that she will never make things easy for him. After this, they kiss underwater after eavesdropers dump them into the canoe lake.