House of Hades. In The Hidden Oracle, Apollo suspects that Zephyrus gives him aid against the Colossus Neronis after accepting Apollo's apology to him. Eurus/Vulturnus - The god of the east wind and autumn. Asclepius/Vejovis – The god of healing who is the son of Apollo and Phoebus. In The Blood of Olympus, Asclepius is first mentioned by Apollo on Delos, as the only person to have ever successfully cured death. Apollo gives Leo, Frank, and Hazel his location in Epidaurus. Piper, Leo, and Jason later meet Asclepius in the Asclepion. He quickly diagnoses Jason with myopia and gives him a pair of glasses. Later, he uses the Pylosian mint and the Makhai to formulate the physician's cure and gives the trio instructions on its use which allows Festus to resurrect Leo after his death. Enyo/Bellona – The goddess of war, who is the mother of Hylla and Reyna (as Bellona). Though she is never seen in the series, she indirectly helps Reyna to kill Orion by empowering her with her strength. Britomartis - The goddess of hunting and fishing nets. In The Dark Prophecy, she encounters Apollo, Leo Valdez, and Calypso at the Waystation where she tasks them to retrieve her pet gryphons, Heloise and Abelard, as payment for the secret route to the lair of Commodus. Later, she contacts the Hunters of Artemis to serve as backup for the protection of Waystation. Britomartis also jump-starts Calypso's lost magic. Deimos – The god of terror. A son of Ares, Deimos appears in the short story "Percy Jackson and the Stolen Chariot" in The Demigod Files, where he torments Clarisse, forcing Percy and Clarisse to cooperate to defeat him. In The House of Hades, he helps to defeat the giant Mimas. Delphin/Delphinus – The god of dolphins, and one of Poseidon's lieutenants. He was seen briefly during a war council meeting in Poseidon's palace in The Last Olympian in the shape of a dolphin. East River – A river god who personifies the river in New York. The East River only appears in The Last Olympian, where he sinks Titan ships coming to attack Olympus for half a sand dollar given to him by Percy. Elpis/Spes – The goddess of hope. She remains in Pandora's pithos as the only thing for humans to keep when other evils were released to the world. In The Last Olympian, the pithos is given