of Camp Jupiter's war elephant Hannibal, first mentioned in The Son of Neptune. His Olympian parent is unknown. In The Tyrant's Tomb, Bobby becomes a zombie due to attacks of eurynomos, and is killed by his friend, Lavinia Asimov/ Butch – The head counselor of the Iris cabin at Camp Half-Blood. He and Annabeth bring Jason, Piper, and Leo to the camp at the beginning of The Lost Hero. He is bald and muscular, with a tattoo of a rainbow on his upper arm. Castor – A son of Dionysus and the twin brother of Pollux (both of whom are named after the Gemini). He is killed in The Battle of the Labyrinth when he was stabbed by a demigod allied with Kronos. Cecil Markowitz – A son of Hermes. In The Blood of Olympus, he is a part of the team sent to sabotage Camp Jupiter's onagers. In The Hidden Oracle, Cecil is the first to be kidnapped by Nero and strapped to a crucifix to be sacrificed to burn the Grove of Dodona, although Apollo and Meg manage to save him. Charles – A son of Hephaestus and the head counselor of the Hephaestus cabin before he died and was replaced by Jake Mason. Like his father, he is a master smith. He is African American. He was in a relationship with Silena Beauregard, a daughter of Aphrodite, and is described as Mrs. O'Leary the hellhound's best friend next to Percy. He dies during an assault on the Princess Andromeda with Percy in the beginning The Last Olympian, around the age of 18. He had plans to attend NYU in the fall. After death, his ghost is visited by Nico in the Underworld where he is waiting for Silena to join him. When Silena dies during the Battle of Manhattan, her last word is Beckendorf's name, suggesting that she sees him in Elysium and that they are reunited in the afterlife. Chiara Benvenuti – A daughter of Tyche. She is Italian and indulges in the language when she curses, which Apollo understands much to his dismay. She has a rivalry with Damien, but is shown to be close friends otherwise. Apollo has more than once expressed his interest on her, though he does it with Damien also. Chris Rodriguez – The son of Hermes. He is often described as wearing a bandana around his head. Chris had joined