emit pitch-black darkness that even Nyx herself cannot see through it. Before she can catch them, the couple leave through the Mansion of Night. Ouranos – The embodiment of the sky, who is the husband of Gaea and the father of the Titans. When Gaea gave birth to the Elder Cyclopes and the Hekatonkheires, Ouranos hurled them into the pits of Tartarus because of their ugly appearances. Kronos later castrated Ouranos before cutting him to pieces. Ouranos then cursed Kronos, stating that his child would come to overthrow him just as he had. Not much is mentioned about Ouranos afterwards. In Percy Jackson's Greek Gods, Percy Jackson describes Ouranos to be tall and muscular with long dark hair and his skin changing depending on if it is day or night. In The Blood of Olympus, its revealed that like his wife Gaea and his son Kronos, his essence is scattered so much that he will never able to form a consciousness again. Phorcys – A primordial sea god and the brother and husband of Keto. In The Mark of Athena, he and Keto run an aquarium in Atlanta, Georgia which contains many rare sea monsters. Following a "VIP" tour, Phorcys traps Percy and Frank (who had turned into a golden koi fish) in a tank to fight each other. This attracts the attention of Gleeson Hedge, who manages to break the glass tank as they escape promising to return and free the sea creatures that Phorcys has in captivity. Styx – The primordial river goddess of the same name. Taking oaths under Styx' name binds people into a contract; breaching them will mean consequences, oftentimes misery, for them. While multiple people have sworn under Styx' name, Styx herself does not appear until The Dark Prophecy, where she appears in Apollo's vision threatening him with punishment for breaking his oath of not playing music or practicing archery until he regains his immortality. In The Tower of Nero, she appears to Apollo after he defeats Python and asks if he has learned his lesson. Apollo finally realizes that the constant disasters that he had attributed to Styx were actually caused by himself while she had only appeared to berate him for his recklessness in each case. Styx is pleased that Apollo has learned his lesson and vanishes, telling him to hold on to what he has learned. Tartarus – While Tartarus is