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Libertus Ostium

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Growing up alongside Nyx, Libertus was always the upbeat and outspoken one. When the situation turns serious, he must confront his fear to prove his valor.
—Official description

Libertus Ostium is a character in Kingsglaive: Final Fantasy XV and a member of the eponymous Kingsglaive. Born in Galahd, he is Nyx Ulric's childhood friend.



Libertus is a heavyset young man with brown hair and brown eyes. He wears the black uniform typical of his fellow Glaives.


Libertus is a cheerful individual who is unafraid to speak his mind. He shows great loyalty to his friends, home, and people.


Despite claiming he does not have the stomach for it, Libertus is able to warp from place to place during combat.


Spoiler warning: Plot and/or ending details follow. (Skip section)

Before Kingsglaive: Final Fantasy XVEdit

Libertus grows up in Galahd alongside his best friend, Nyx Ulric. The two eventually become members of the Kingsglaive.

Kingsglaive: Final Fantasy XVEdit

I'll fight my own fight from here on out.
—Libertus Ostium

Alongside his fellow Glaives, Libertus fights the forces of Niflheim and Tenebrae on the outskirts of Lucis. He injures his leg while attempting to escape from Diamond Weapon, but Nyx rescues him. Libertus is taken back to Insomnia on a stretcher, and he is given a crutch and pain medication to help him walk again.

The next evening, Libertus joins Nyx, Crowe Altius, Luche Lazarus, and Pelna Khara for a drink. He is skeptical when Luche reveals Niflheim has sent an envoy to demand Lucis's surrender, but a news report confirms this the following morning. Libertus and Nyx see Crowe off on a classified mission to rendezvous with Princess Lunafreya Nox Fleuret, and a short time later, they learn she has been killed. After seeing Crowe's corpse, Libertus abandons the Kingsglaive and allies himself with a band of Lucian rebels.

After the fall of Insomnia, Libertus helps Nyx to discover their commanding officer, Titus Drautos, is truly Imperial General Glauca. He agrees to get Princess Lunafreya out of the city, and he drives her to safety as Nyx engages Glauca in a climatic battle.

Spoilers end here.

Creation and developmentEdit

The likeness of Liam Mulvey, an English actor, is used to portray Libertus. Mulvey also serves as the character's motion capture artist.


In the Japanese version of Kingsglaive: Final Fantasy XV, Libertus is voiced by Mitsuaki Kanuka. In the film's English version, he is voiced by Liam Mulvey.



Libertus means "freedman" in Latin.

Ostium means "door" or "entrance" in Latin.

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