Annabeth in The Mark of Athena. He guides her to the beginning of the Roman leg of her quest for the Athena Parthenos. To Annabeth, he looks exactly like Gregory Peck. Rhea Silvia – Rhea Silvia is a former Vestal Virgin who mothered Romulus and Remus, the founders of Rome. She was made an immortal and wife of Tiberinus after she was given a death sentence for breaking her chastity vow. In The Mark of Athena, Rhea Silvia and Tiberinus give advice to Annabeth about the location of the Athena Parthenos. She is described as looking like Audrey Hepburn. Triptolemus – The god of farming who is associated with Demeter. He was once a mortal prince who assisted Demeter after Persephone was taken to the Underworld and was eventually made into a minor god by her as a reward. In The Mark of Athena, Frank, Hazel and Nico seek him out on the advice of Hecate. Due to his hatred for Hades, Triptolemus turns Nico into a corn plant and refuses to heal Hazel's poisoning, but he eventually makes a deal with Frank to help if Frank can obtain him a new serpent for his chariot. After Frank succeeds, the god restores Nico and heals Hazel before giving them an antidote to the poison that they will have to drink to enter the House of Hades. Triptolemus then takes off in his chariot to spread knowledge about agriculture to the world. Triton – A sea god depicted as a merman with two fishtails. He acts arrogant towards Percy, but respects Tyson. Tyche/Fortuna – The goddess of fortune, who was awarded Cabin 19 at Camp Half-Blood after the Second Titan War. Her Roman counterpart Fortuna is celebrated by Camp Jupiter in the "Feast of Fortuna" on 24 June every year to decide what fortune that would befall the camp. Primordial deities The primordial deities are the deities that came before the Titans and the Olympians came into existence. Among the known primordial deities are: Gaia/Terra – The embodiment of Earth who and the primary antagonist of The Heroes of Olympus series. Gaia is the wife of Ouranos, and mother of the Titans, the Elder Cyclopes, the Hekatonkheires, the Giants, and Antaeus. She is the grandmother of the Olympians, whose rule she resents. As of The Son of Neptune, she remains sleeping in the ground, but retains some consciousness and influence. Like