up their immortality to grow old together. In The Dark Prophecy, she saves Calypso, Leo and Apollo from the Blemmyae with crossbow turrets and lets them stay at the Waystation. She comments on the similarities between Calypso and her half-sister Zoë Nightshade. Triumvirate Holdings Triumvirate Holdings is a company that is led by three beings who are said to be the worst Roman Emperors in history. They force other people to worship them. During the Second Titanomachy, Triumvirate Holdings was responsible for giving Luke (at the time under the influence of Kronos) and his allies the Princess Andromeda, weapons, helicopters, and top human mercenaries. During the Second Gigantomachy, Triumvirate Holdings supplied Octavian with different weapons. Rachel described Triumvirate Holdings to be so rich that they make her father's company "look like a kid's lemonade stand". The trio have divided up North America into three major empires and are hunting for Oracles, which they plan to destroy. Among the known members of Triumvirate Holdings are: Emperor Nero – A legacy of Apollo who is the main antagonist of The Hidden Oracle and one of the two main antagonists of The Tower of Nero alongside Python. The last in the Julio-Claudian dynasty, Nero is infamous for his tyranny and overindulgence in wealth and luxury with little regard to his subjects. He is the deified Roman Emperor, who has survived through the millennia along with two other deified Roman emperors—the Triumvirate. He forms an alliance with Python, who holds Delphi, while he himself controls the other oracles and plans to destroy Dodona. As the Emperor of the East, Nero lives in New York City, where he recruits and trains homeless demigods, and controls the eastern third of North America. He and the other two Roman Emperors have established Triumvirate Holdings. As "the Beast", Nero killed Meg's father, but later adopted and trained her in demigod arts so she could eventually lure Apollo into the Grove of Dodona. After Rhea restores the Grove of Dodona at Camp Half-Blood, Nero tries to force Apollo and Meg to burn the trees; failing at that, he sends a giant statue of himself, the Colossus Neronis, which originally stood in Rome, against Camp Half-Blood and Apollo and the Greek demigods defend the camp against it. He is killed by Apollo in The Tower of Nero and his power absorbed by Python. Emperor Commodus - Commodus is the main