Rhea loved the children that she gave birth to and even kept Zeus from being eaten. Since Kronos' defeat, Rhea retreats to Upstate New York, but continues to keep in touch with her children. In The Hidden Oracle, Apollo learns that an oracle that Rhea created called the Grove of Dodona is the only one yet to be conquered by Nero. Rhea subsequently appears to Apollo to offer him advice. Aigaios – A partner of Oceanus who assists in the Titans' War against Poseidon. In The Titan's Curse, Tyson reports that Aigaios protected the Princess Andromeda (a cruise ship carrying the Titan Army) from Poseidon's wrath. Atlas – The general of the Titan army. He is the father of Calypso and the five Hesperides, one of them being Zoë Nightshade, who is later disowned because she helped Hercules steal the golden apples. Atlas was imprisoned on the mountaintop of Mount Tamalpais near San Francisco, forever cursed to hold up the sky. He is extremely powerful and strong, even for a Titan. He served as the primary antagonist in The Titan's Curse, but is mocked by the other Titans in later books for his failure. He does not participate in Kronos's final assault. Helios - The Titan of the Sun and the grandfather of Medea. In The Titan's Curse, Apollo mentions that Helios and Selene faded when the Romans took over and his role was given to him. In The Burning Maze, Medea summons her grandfather from the depths of Tartarus so that she can absorb his power alongside the essence of Apollo and make Caligula the new God of the Sun. Helios is summoned again to fight Apollo, Piper, and Meg. When Medea is defeated, Helios goes supernova. When Apollo encounters Helios in the burning maze, Apollo promises to free him from Medea's control in exchange that he lets them pass. After Piper kills Medea and frees Helios from his prison, Apollo persuades Helios to hold his rage and finally rest while planning to keep his memories alive. Hyperion – Titan of the East. Hyperion is the father of Helios and Selene, the Titans of the sun and moon, respectively. He appears in The Last Olympian, where he is clad in full golden armor and battles Percy. He has all the powers of the Sun. Grover Underwood traps Hyperion by turning him into a tree. In The House of Hades,