Poseidon

is a Divine Spirit and the God of the Seas in . He is featured in the backstory of the Okeanos Singularity and one of the Lostbelts in Fate/Grand Order.
==Profile==
===Background===
Poseidon is the God of the Seas and Earthquakes in Greek mythology, and brother of Zeus, King of the Gods, and Hades, God of the Underworld. A son of the leaders of the Titans, Kronos and Rhea, Poseidon was a Machine God sent by Chaos from another Universe to colonize another planet. After thousands of years of wandering out the universe, he and the other ship gods made an emergency landing on Earth, which met 78% of their landing conditions. There, Humans started to worship them as gods. During 12,000 BC, he was killed by Sefar, and eventually reincarnated in Greece as a Divine Spirit.
As with the other Olympians, Poseidon plays a role in many stories of Greek mythology and their derivatives. One of his sons was the hunter Orion, who gained the love of Artemis and as Poseidon's son was able to walk on water.Fate/Grand Order material II - Orion, pg.192-201 Poseidon gave the divine horses Balius and Xanthus to Peleus as a wedding gift, who would later be used to pull the chariot of Peleus's son, Achilles. Minos, king of Crete, had a promise with Poseidon to sacrifice a bull presented from the sea god, however one year he broke the promise and sacrificed another bull instead. For breaking the promise, Poseidon cursed Minos's wife Pasiphae, causing her to have sexual desires towards bulls and resulting in the birth of Asterios.Fate/Grand Order material II - Asterios, pg.120-129
In the story of Medusa, which differs from her actual life, Poseidon's pursuit and violation of her is responsible for her subsequent curse and transformation into a monster by a goddess, either Poseidon's wife or Athena, and his children with her, Pegasus and Chrysaor, are born from her neck after she is decapitated by Perseus. In another story, he had his way with the Caenis but granted her a wish as compensation, transforming her into the male and giving him impenetrable skin, so as not to suffer the same fate again.
In Roman Mythology, he is known as .
===Appearence===
Originally, Poseidon was a Machine God just like his lostbelt counterpart, however, after being vanquished by Sefar, he was degraded into a Divine Spirit. Triton inside Captain Nemo notes that Poseidon wasn't as mechanical as the Twelve Machine Gods seen in the Atlantic Lostbelt.Fate/Grand Order: Cosmos in the Lostbelt - Atlantis: Ancient Ocean of the Dreadnought Gods, Section 9: Peacefully Reminisce around a Fire 
===Personality===
Triton remembers what Poseidon truly looked like only because Poseidon gave him special treatment since he entrusted him to defend the seas as his successor. Captain Nemo doesn't think he thought of his "children" who lived on land as anything more than Familiars. Super Orion confirms he doesn't actually know anything about his father, and that he doesn't even remember having met him when he was alive.Fate/Grand Order: Cosmos in the Lostbelt - Atlantis: Ancient Ocean of the Dreadnought Gods, Section 15: An Absent Monster and Great Labyrinth in the Ruins
==Role==
===Fate/Grand Order===
====Third Singularity: Okeanos====
Prior to the events of the Okeanos Singularity, Francis Drake had reached Atlantis after a seven-day voyage and encountered Poseidon, who intended to flood civilization. Drake subsequently defeated Poseidon, taking a Holy Grail which was in his possession and causing Atlantis to sink. Drake's grail would interact with the other grail which was planted into the era to disrupt the Human Order Foundation, resulting in the endless sea of the Okeanos Singularity.Fate/Grand Order - Okeanos: The Four Sealed Seas of the End
==Abilities==
Although he possesses Authority over the seas, due to being from the same line of ships as Demeter, he is also worshipped as an Earth God, granting him Authority over the Earth.
===Noble Phantasm===
Poseidon's primary weapon is a trident, a Divine Construct that holds the power to control all the Authorities of the Sea and which is said to cause earthquakes when he strikes with it. Poseidon Maelstrom, an EX-rank Anti-Fortress Noble Phantasm is just a limited reproduction of a small portion of his Authority over the Ocean. Caenis's Divine Core is unable to handle its full power and would be destroyed if she attempted to use its full potential.
==References==
vi:
Category:Divine Spirits
Category:Greek historical and mythological figures
Category:Roman historical and mythological figures
Category:Twelve Olympians
Category:Machine Gods
Category:Aliens
Category:Spacecraft
Category:Watercraft
Category:Third Singularity Inhabitants
Category:Introduced in 2004
Category:Medusa and Perseus (topic)