and Will confront Octavian who fails to notice that his robes got caught in the firing ropes. Remembering Hades' wisdom that some deaths should not be prevented, Nico allows Octavian to fire, resulting in the insane Roman launching himself at the goddess as well. Octavian is killed in the explosion, but his actions are covered up and he is declared a Hero as his shot may have actually aided Leo Valdez in defeating the goddess. From Leo's perspective, he heard a comet shrieking like a little girl as it flew towards him, much to Leo's surprise and confusion. However, Nico is left worried that all he did by allowing Octavian to kill himself is to kill Leo, unaware that Leo was resurrected after the battle. Mythological figures The following characters from Greek mythology appear in this series. Most of them are the direct children of gods or Titans, but a few are mortals with such great power that they are able to influence the realm of the gods. Achilles – The son of Thetis and Peleus. The ghost of Achilles appears briefly in The Last Olympian, warning Percy about the Curse of Achilles. Agamethus – The son of King Erginus and mortal half-brother of Trophonius. He was decapitated by Trophonius to spare the latter from being captured following a disastrous attempt to steal the riches of King Hyrieus. His headless ghost resurfaces to deliver baby Georgina to Hemithea and Josephine at Waystation and later becomes a constant visitor of the sanctuary. Lacking a head, he speaks by arranging the letters of a Magic 8 Ball. Charon – The ferryman who carries the dead across the River Styx to the underworld. Percy and his friends meet him in The Lightning Thief. He also states he does not like being confused with the centaur Chiron. He likes Italian suits. In the film adaptation, Charon is played by Julian Richings. In the musical, Charon is portrayed by Carrie Compere. Chrysaor – A half-giant who is the son of Medusa and Poseidon, the brother of Pegasus, and the father of Geryon. He is first mentioned in The Last Olympian when Percy and Annabeth go to see the Oracle of Delphi in the attic of the Big House. A pair of fuzzy dice is said to have been stolen from his car. In The Mark of Athena, Chrysaor and his crew attacked the Argo II