and the queen of the underworld. Persephone is the wife of Hades and the daughter of Demeter and Zeus. Hades only allows her to visit Demeter, her mother, in the spring and summer. She is said to be able to "soften" Hades and make him more merciful. Unlike most minor gods, she sides with Olympus during the war against the Titans. In the film adaptation, Persephone is played by Rosario Dawson. Phobos – The god of fear. A son of Ares, Phobos appears in the "Percy Jackson and the Stolen Chariot" story in The Demigod Diaries, where he torments Clarisse along with his brother. He has the power to show people their greatest fears, but Percy and Clarisse cooperate to defeat him. In The Blood of Olympus, a statue of Phobos is used by Piper to kill Mimas which fulfills the requirement of "one god and one demigod cooperating" in killing giants. Pomona – The Roman goddess of plenty. Pomona isn't seen in person, but a statue of her speaks in The Last Olympian, becoming irritated when she is mistaken for Demeter by Percy, throwing bronze apples at Percy and Will Solace. Terminus – The Roman god of boundaries. In The Son of Neptune, Terminus is portrayed as obsessive-compulsive and obsessed with order. He guards the city limits of New Rome in the form of a number of statues of himself and often irritates Percy during his time in New Rome. When Polybotes attacks the camp, Percy convinces Terminus to help him kill the giant as a giant can only be killed by a demigod and a god working together. After defeating Polybotes, Percy smashes him in the nose with Terminus' head, causing the giant to disintegrate. Terminus subsequently relieves Percy of any further inspections by the god. In The Mark of Athena, he confronts the Argo II when it arrives. In The Tyrant's Tomb, Terminus protects his young assistant Julia during the Battle of San Francisco Bay. After Julia's parents are both killed in the attack, it is stated that Terminus intends to adopt the young girl himself. Thanatos/Letus – The god of death and a lieutenant of Hades. In The Son of Neptune, the forces of Gaea capture Thanatos, allowing their dead allies to quickly return to life. He resumes his duties after being rescued by Percy, Hazel, and Frank. Tiberinus – A river god who appears to