imprisonment. The second group of Cyclopes are the ones who are the children of Poseidon. Tyson is one of these. The third group of Cyclopes is the southern group who raise goats and live in caves. The fourth group of Cyclopes is the northern group who helped the Titans make weapons and are smarter than the southern group of Cyclopes. Some northern Cyclopes were seen fighting with Kronos' army in The Battle of Manhattan. In The Dark Prophecy, many Cyclopes were present at the rehearsal of Commodus' naming ceremony. Grunk - A Cyclops that is loyal to Caligula. In The Burning Maze, he was seen by Apollo and Piper playing volleyball with some mortal mercenaries. Piper sings them a song to distract them so that they can get away. Ma Gasket – A female cyclops of the Northern Cyclops faction who is the mother of Sump and Torque. She appears in The Lost Hero when Jason, Piper, and Leo visit her factory, Monocle Motors in Detroit. She is destroyed when Leo drops an engine on her, but due to the Doors of Death being open, she quickly begins reforming. In The Son of Neptune, Ma Gasket leads the Cyclopes in an attack on Camp Jupiter where she is destroyed for a second time by Tyson. Sump – The son of Ma Gasket who appears in The Lost Hero. Torque – The son of Ma Gasket who appears in The Lost Hero. Polyphemus – A cyclops of the Southern Faction. Percy Jackson and his friends encounter him on an island in The Sea of Monsters. He is shown to be blind and there was also a reference about Odysseus being responsible for blinding him under the alias of "Nobody". When Polyphemus tries to pray to Poseidon to get revenge on Percy for hurting him, Percy states that Poseidon is also his father. He later tried to eat them only for them to escape. However, Polyphemus sinks their ship in the process. In The House of Hades, Annabeth falls victim to a curse of blindness that the arai lay upon her due to Polyphemus cursing Annabeth for using her invisibility to trick him. Bob the Titan is able to cure Annabeth of the affliction. In The Hidden Oracle, it's suggested that Leo, Festus and Calypso had a run in with Polyphemus while they were stuck in the Sea of Monsters. In Percy