Saber (セイバー, Seibā?) is a Saber-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.



Saber's True Name is Jason (イアソン, Iason?), captain of the Argo. He was one of many heroes taught by Chiron.[1]

Jason argued with King Pelias, the usurper of his father's country Iolcos, and eventually made him promise to return the country upon traveling far east to Colchis and returning with the Golden Fleece. The golden fleece was owned by King Aeëtes of Colchis.

When Jason arrived in Colchis. Jason was supported by the Goddess Aphrodite, and upon realizing that the King of Colchis was unshakable, she decided to control the mind of his daughter Medea to help Jason. Medea was made to blindly love Jason, which resulted in her betraying her father and her country for a foreigner she had never seen. Her abilities allowed her to nullify her father's magic and the enchanted fire-breathing oxen, which gave Jason the chance to obtain the Golden Fleece.

King Aeetes was infuriated, and decided to personally lead his army to capture Jason before he left the country. Aphrodite once again used Medea to assist Jason's escape by forcing her to kill her own brother, Apsyrtus. While she only knew Jason by name, her forced love caused her to board his ship, the Argo, and slice her brother into pieces right before the eyes of her pursing father. The King, overcome by grief, ordered for the collection of the pieces of his dead son, which allowed for the opportunity for the Argo to escape its pursuers.

After that, Medea, in order to let her beloved Jason sit on the throne, continued to murder any opposition with magic and strategy, but her practices disgusted Jason and caused him to gradually become adverse to her. Eventually, Jason switched his interests to another woman, going so far as to have children, which Medea could not forgive. She murdered his new wife and children with magecraft, the brokenhearted Jason undergoing a miserable last moment as he was crushed by the dilapidated Argo.[2]


In Fate/Grand Order, Jason has the appearance of a young man with blond hair. In the anime adaption of Fate/Stay Night, however, Jason has dark hair.


Eh, I'm a Saber? Not a Lancer or a Rider?

Jason's greatest skill is his charisma. A natural-born leader, Jason is even capable of convincing Heracles as a Berserker to follow his commands. Indeed, in spite of lacking any genuine combat abilities, Jason was able to lead the Argonauts through his words alone.

Jason is a fan of Heracles. He does not take Heracles's defeat, or defeat in general, very well. While some people consider him "useless," and Medea has justifiable reasons for hating him, Jason is a man with good intentions. He simply acts rudely and mercilessly towards anyone who stands in his way.


Fate/Grand OrderEdit

Okeanos: The Four Sealed Seas of the End Edit

Jason is an antagonist in the third singularity, "Okeanos". He seeks out the Ark of the Covenant to grant himself ultimate power. Jason sails aboard the Argo, along with Heracles, Medea Lily and Hector. Jason was transformed into the Demon God Forneus by Medea Lily.

Atlantis: Ocean in the Age of Titans Edit

Jason make a reapperance when he and the Argonauts are summoned by the Counter Force to establish a beachhead for Chaldea's arrival. At some point during this time, The Argo comes under attack from Artemis. Heracles sacrifices himself to ensure that Jason and the Argo survive knowing that only Jason has the right charisma and ocean combat experience to help Chaldea. He will eventually reward this faith by redeming his past actions with his role during this Lostbelt.

Eventually, Chadea's forces arrive and Jason joins up with Chaldea's master, in assisting with countering Odysseus's forces and using the Argo to travel around the Lostbelt. During this time he forms the Neo Argonauts with Super Orion, Mandricardo, Charlotte Corday, Achilles, Paris, Mochizuki Chiyome, and Bartholomew Roberts. He is critical as the Battle Commander for the Chaldean Forces during the final battle against Odysseus. He sacrifices himself to assist in delaying Odysseus after revealing that he had been critically wounded during the Argo's escape from Artemis and was barely hanging on. Medea had cast an illusion to make him seem normal and healthy to not drop morale.

By the end of the chapter, none of your allies that made it in are around anymore. Chiyome allows herself to be devoured so she can poison Echidna. Francis Drake gets disintegrated by Lostbelt Artemis, incapable of fleeing the island due to a curse. Corday has a Mutual Kill with Odysseus. Bartholomew Roberts sacrifices himself to get Orion into firing position against Lostbelt Artemis. Paris and Apollo become the arrow Orion uses to shoot down Lostbelt Artemis, but it claims the lives of all three in the process. Achilles is killed by the Lostbelt version of Chiron after defeating most of Odysseus' fleet and the Stygian Birds. Hector (summoned via Achilles' sacrifice) destroys himself in order to deflect an attack from Lostbelt Artemis. Jason is left bleeding out as he tells the others to go on without him as he confronts Chiron one last time on the collapsing Lostbelt Poseidon. And Mandricardo performs a Heroic Sacrifice against Artemis to save everyone else.

Other appearancesEdit

In the Studio Deen adaptation, of Fate/stay night, Jason was seen in Caster's flashback where he was marrying Creusa which later breaks Medea's heart as she was seen crying. Jason makes a brief appearance in the first season anime adaptation of Fate/stay night [Unlimited Blade Works].

It is the scene where Shirou Emiya was heading towards Ryuudou Temple, where he is being controlled by Caster, Jason was seen holding the Golden Fleece.

In Fate/Apocrypha, it is mentioned that a remnant of the Argo is a catalyst that would be able to summon Jason and various other Greek heroes who sailed on the ship.

The ~turas réalta~ manga adaptation specifies that he was summoned to Okeanos by Lev Lainur Flauros, who reveals Medea's deception to him after Heracles' defeat. Lev mocks Jason's dream and Heracles' status as the strongest Hero, enraging Jason to the point of trying to slay him, only for Medea to stab him in the back and force his transformation into a Demon Pillar.

Jason is mentioned to be one of the ten Servants who can be summoned by the Player in the prototype of Fate/strange Fake. Jason also appears in the shared dream of Bazdilot Cordelion, the Master of True Archer, that is a memory of his Servant. In the dream, Jason claims that he will become the greatest king, who will create the best and fairest nation, where even someone like Heracles, can live without worry. After he wakes up, Bazdilot talks about the dream with True Archer, calling Jason a fool. Although True Archer agrees, he tells Bazdilot to not treat Jason badly, as Jason was one of the few people that considered him a friend.[3]


  • Argo

Jason is said to be weak to the point where it is possible to not even count him as an enemy, described by Atalanta as a "useless person". While he can be described as the "monster who organized the Argonauts" with only his eloquence and charisma, his power in battle does not amount to anything.  

He captains the Argo (アルゴー号, Arugō-gō?) while his allied Servants do the fighting for him. Argo is a ship carrying Heroic Spirits from the Age of Gods.[4] It is brought about as his Noble Phantasm, Astrapste Argo.

As a fighter, Jason's skills with the sword are mediocre despite his past training with Chiron, though they are manageable enough to allow him to hold his own for a bit but nothing more. However, Jason's true power lies in his charisma and ability as a leader, having been the one to gather numerous Greek heroes under his leadership including the famous hero Heracles, who even listens to his commands even while summoned as a Berserker. Thus Jason has the allies that once sailed with him on the Argo to do the fighting for him, doing so to great efficiency. His tactical prowess as a leader shows even in the battle at Solomon's Temple, organizing the Servants to defend Heracles while he takes on the Demon Gods.

Atlantic LostbeltEdit

Jason possesses Klironomia nanomachines, although he didn't implemented himself with nanomachines, he used it to turn Golden Hind into Argo. Medea gave him an ability to cover up his own wounds, letting other see that he is fine when he is not.


In the Studio Deen adaptation of Fate/stay night, Jason had the appearance of a middle aged bearded man.


  1. Fate/strange Fake Volume 4, Chapter 10: "Separate Mornings, Separate Parts (Part 1)"
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