Nyx Ulric

Nyx Ulric is a major character in Final Fantasy XV Universe, serving as main protagonist of the 2016 science fantasy animated film and a posthumous character of 2016 RPG video-game Final Fantasy XV.
Hailing from Galahd, he is tasked with protecting Princess Lunafreya of Tenebrae when Niflheim invades Lucis as a member of the Kingsglaive.
He is voiced by Aaron Paul in the English version and Gō Ayano in the Japanese version.
==Appearance and Personality==
Nyx is a young man with brown hair and blue eyes. He wears the black uniform typical of his fellow Glaives, but his is customized with a silver horn on its hood, purple ribbons on its back, and pelts of blue-gray fur on its left sleeve. The horn may be in allusion to King Regis, who wears a hornlike crown on the same side as Nyx has his horn.
Nyx has small and subtle tattoos. He has a "crow's foot" on his right cheek, and a line and a dot under his left eye. He has markings on his ears, a line down his neck, one around his right leg and a line down his middle finger of his left hand, and another down his forefinger on his right hand.
Nyx is a heroic individual who feels indebted to King Regis. He is confident in his abilities, but is haunted by the memory of his sister's death, which can cause him to have flashbacks during battles whenever his friends are in danger of not being able to save her. 
This is why he does all in his power to save his comrades, who call him by the moniker "hero" from his exploits. When his comrades betray him, Nyx remains loyal to the Lucian royal family, as well as his best friend Libertus and Lady Lunafreya; when Insomnia falls, he hangs onto hope and resolves to fight for the future thanks to Lunafreya's encouragement about Nyx's sister wanting him to see a brighter future.
Nyx is selfless, as he refuses to choose between Libertus or Lunafreya when requesting the power from the Ring of the Lucii. Nyx elects to instead sacrifice his own life to the past Lucian kings' spirits, who grant the ring's power to those they deem worthy. Nyx bargains with them knowing that the price for using the ring's powers for those not of the Lucian royal blood is a life. Unlike his former mentor and superior, Titus Drautos, who was also General Glauca, Nyx can move on from his past to fight to help give the world a future, something that would not happen if Niflheim claimed the Ring of the Lucii instead of Prince Noctis. As a result, he was no longer fighting to protect Insomnia and did not care what happened to the city as long as he kept the Ring of Lucii away from the Empire's hands.
Although he is selfless, it can be interpreted as arrogance, which leads to the old kings initially judging him as unworthy. Even when he proves his worth, Nyx gloats, saying the kings would lose their "precious ring" if they burn him.
==Abilities==
*Magic Prowess: Known for having a special affinity for wielding the powers of the Kings of Lucis, Nyx's mastery of magic was exemplary, particularly being a master of warping with his weapons but is also capable of creating magic shields with protect magic and casting strong thunder spells. Although initially inferior to King Regis due to only having a portion of the latter's powers, after being accepted and empowered by the Ring of the Lucii, Nyx became even more powerful than him and he can command the Old Wall.
*Combat Prowess: Wielding top-class fighting abilities among the Kingsglaive, Nyx wields his daggers with outstanding skill, able to easily defeat many Nifleheim soldiers, including Magitek Infantry, and is even able to stand up to General Glauca, in actuality Titus Drautos and his former superior among the Glaives: Although he got trounced ultimately by Drautos at first, after acquiring power from the Ring, his combat prowess were enhanced to levels to finally meet blow-to-blow with Glauca and land considerable injuries, although he only managed to kill him after he surprised him.
== Story ==
=== Kingsglaive: Final Fantasy XV ===
Nyx grew up alongside Libertus Ostium in Galahd. His sister was killed, and he was saved by King Regis of Lucis. Seeking to repay his debt to the monarch, Nyx joined the Kingsglaive, an elite unit of soldiers whose members are chosen for their aptitude for magic.
Alongside his fellow Glaives, Nyx defends the borders of Lucis from Niflheim and Tenebrae's forces. He disobeys Captain Drautos's order to retreat, and instead chooses to save Libertus, his childhood friend, from Cerberus, a powerful three headed beast. As punishment Nyx is placed on guard duty upon his return to Insomnia, the crown city of Lucis.
Three days before a peace treaty is to be signed between King Regis of Lucis and Emperor Iedolas Aldercapt of Niflheim, Nyx is relocated to the Citadel by Drautos. As mentioned in Final Fantasy XV Prologue Parting Ways, Drautos has Nyx drop Noctis off to his place as thanks for using his car. The men discuss the death of Crowe Altius, and the next day, Nyx gets into a heated argument with Libertus after seeing Crowe's corpse. That evening, Nyx attends a party celebrating the treaty signing and meets Princess Lunafreya Nox Fleuret.
On the day the peace treaty is to be signed, Nyx discovers Lunafreya has been kidnapped and Drautos has mysteriously disappeared. He demands the Kingsglaive's deployment from King Regis, and leads his comrades on a mission aboard a Niflheim airship to rescue the princess. Nyx is betrayed by a majority of his fellow Glaives who disagree with the peace treaty terms and deem the king has abandoned them. Nyx frees Lunafreya and uses the airship to fly back to the Citadel with her. They witness the Wall fall as Niflheim begins its invasion, deploying daemons and magitek infantry to annihilate the city. Nyx and Lunafreya help a wounded King Regis escape Imperial General Glauca, who seeks the Ring of the Lucii, a ring that gives special powers to the past kings' chosen.
At the end of a secret passageway, Nyx questions King Regis's decision to sacrifice Insomnia for Prince Noctis's continued safety. He agrees to protect Lunafreya, who is given the Ring of the Lucii, and flees with her after Regis is impaled by Glauca's blade.
As he and Lunafreya drive away from the Citadel, Nyx is contacted by Drautos and ordered to rendezvous with him in Section D of Insomnia. In the city plaza, he is attacked by a fellow Glaive Luche Lazarus and discovers through Libertus's intervention that Drautos is Glauca. To protect his friends, Nyx puts on the Ring of the Lucii and is granted its power in exchange for his life. After ordering Libertus to get Lunafreya somewhere safe, he gives her the ring to deliver it to Noctis. Nyx engages Glauca while wielding the power of the old kings. In the clash's aftermath, Nyx dies peacefully as he wishes Noctis a healthy rule.
=== Final Fantasy XV ===
Ten years after the world is plunged into darkness with the Starscourge, an illusory version of Nyx's corpse hangs in chains from the ceiling of the Citadel's throne room. Ardyn Izunia uses it to discourage Noctis. The corpse has white crystalline scarring, showing the damage Nyx sustained by using the Ring of the Lucii.
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