In The Blood of Olympus, Jason, Piper, and Annabeth encounter the ghosts of the Suitors of Penelope on Ithaca where they are now allied with Gaea. After their true identities are revealed by the ghost of Michael Varus, the three destroy the Suitors. Antinous – One of the suitors of Penelope. Eurymachus – One of the suitors of Penelope. Theseus – A Hero who is the son of Poseidon and younger than Percy had assumed. When Nico was trying to summon Bianca in The Battle of the Labyrinth, he ended up summoning the spirit of Theseus. Other Greco-Roman beings Greco-Roman humanoids Many of the beings and creatures of Greco-Roman myths are humanoid—in other words, they possess both the intelligence and some of the physical features of humans. The vast majority of these creatures are friendly, such as nymphs and centaurs. Unlike most Greek creatures, these beings are also unquestionably sentient and tend to have larger roles in the novel series. Agrius and Oreius – Humanoid bears that were a result of a union between a woman named Polyphonte and a bear due to the power of Aphrodite. They were also the great-grandsons of Ares due to Polyphonte being Ares' granddaughter. The two served as Luke's henchmen in The Sea of Monsters but were killed by the party ponies and Blackjack the Pegasus. Amazons – A tribe of female warriors who usually worshiped goddesses like Hera and Artemis. Some Amazons appear in The Son of Neptune where they are sent to their compound at Reyna's request. They also run the billion-dollar Amazon.com, which they use as a source of cover and revenue. Though they are often confused with the Hunters of Artemis, the Amazons are not misandrists and like men just fine; they are just a very matriarchal society in which their male spouses are made to work in manual labor while the Amazons work as administrators. In The Blood of Olympus, the Amazons collaborate with the Hunters of Artemis to protect Reyna from Orion, resulting in many casualties. Doris – An Amazon who is loyal to Otrera. In The Son of Neptune, she and Lulu guarded Percy Jackson and Frank Zhang. Hylla Ramírez-Arellano – The older sister of Reyna, the praetor of Camp Jupiter; she is 22 years old. She is a demigod daughter of Bellona and the Amazon Queen. She looks a lot like Reyna with beautiful, glossy black