Jason

Biodata

Feature	Details
Name	Jason (伊阿宋)
Alias(es)	Captain Jason; Prince of Iolcus; son of Aeson; grandson of Cretheus 2 7
Species/Race	Human; later a Heroic Spirit summoned as Rider 173 174
Gender	Male 87
Affiliation	Chiron's student; captain of the Argonauts; commander of the Greek allied army during the Trojan War 2 15 174
Occupation/Role	Hero, king claimant, Argonaut captain, military commander
Status	Deceased in life; recorded on the Throne of Heroes and later summoned as a Rider-class Servant 116 173
First Appearance	Mentioned in Chapter 1; appears in Chapter 2 1 2

Appearance

Jason is a handsome, blond-haired, green-eyed Greek hero. At twenty, he is four years older than Thaumas. 3 177

• Golden-blond hair and green eyes 177
• Often carries himself with exaggerated confidence, puffing out his chest and posing proudly 2
• Uses an old king's ceremonial sword while commanding the Greek army 174

Personality

Jason is boastful, vain, cowardly under immediate pressure, and quick to claim credit for others' achievements. He calls himself the greatest captain, shirks work during the Argo's construction, and routinely provokes stronger companions such as Pollux and Atalanta. 7 55 94

Beneath his bluster, Jason is a genuine hero with exceptional survival instincts, leadership charisma, and a capacity for growth. Thaumas's insistence that heroes must not prey upon the weak pushes him to return stolen villagers' property and rethink what heroism means. 3 11

His confidence in Thaumas is nearly absolute. Although he treats Thaumas as his strategist and frequently burdens him with problems, he remembers that Thaumas sincerely believed he could become a hero when few others did. 105 174

Abilities & Skills

Command and Strategy

Jason is an accomplished commander who uses his crew's individual strengths, favors maneuver and deception over direct confrontation, and remains especially dangerous when cornered.

• Led the Argonauts on the voyage for the Golden Fleece and assembled heroes from across Greece 15 93
• Used caution and delegation against the Fire Bulls rather than committing the crew blindly 106
• Directed the encirclement of Troy by capturing surrounding allied city-states over more than a year 177
• Devised the feint-east, strike-west campaign and coordinated the capture of Thebes 174 175
• Possesses the special skill A Commander in Desperate Straits Never Loses!, which strengthens him when forced into a desperate situation 174

Glorious Sea of Splendor

Jason can deploy a Reality Marble embodying the sea crossed by the Argo and the glory of the Argonaut expedition.

• Pulled Hector into the manifested sea for their decisive confrontation 177
• Gains a home-field advantage in Greece, allowing him to manifest the Argo with Thaumas's mana support 174 177

Shining Ship That Tears the Sky

Jason's Noble Phantasm manifests the Argo and calls the Argonauts to his aid. Its strength depends on whether his cause is recognized as just by his crew. 2 177

• The Argo is an undrownable, divinely aided ship that never loses its way 15 174
• Summons Argonauts to launch a coordinated assault 177
• Its power falls drastically if Jason is clearly in the wrong, as the crew may refuse to board 177
• Full use shatters Jason's Spirit Origin by distributing its burden among the summoned heroes 177

Relationships

• Thaumas — Fellow student, closest friend, strategist, and later Master. Thaumas helps Jason pursue Iolcus and shapes his moral development; Jason trusts him as the person who first truly believed he could be a hero. 2 3 105 174
• Chiron — Mentor who trained Jason at Pelion Cave and permitted him to begin his heroic journey. 1 2
• Athena — Divine patron who gives Jason a conditional prophecy, aids his return to Iolcus, and arranges the construction of the Argo. 7 15
• Hera — Her intervention against Pelias enables Jason's quest for the Golden Fleece, though her relationship with Jason is complicated by Thaumas's involvement. 12 13 14
• Medea — Argonaut companion and later vice-captain. Jason relies on her during the resistance against the gods, then orders her to survive by betraying him if necessary. 94 118
• Heracles — Senior hero and Jason's greatest source of confidence; Jason repeatedly relies on his presence and strength. 93 118
• Castor and Pollux — Argonaut crewmates who frequently punish Jason for laziness, insults, and reckless behavior. 55 93
• Hector — Fellow commander and opponent in the Trojan War. Jason respects Hector's tactical ability and ultimately defeats him through the united Argonauts. 175 177

Story Role / Major Arcs

Departure from Pelion and Iolcus

Jason leaves Chiron's care after Thaumas swears to help him reclaim Iolcus. Though initially suspicious of Thaumas's schemes, he accepts the pact because of his desire for his throne and heroic glory. 2 3

During their journey, Jason defeats bandits while Thaumas forces him to return the villagers' stolen belongings. Jason complies only reluctantly, but the incident marks his first step away from treating heroism as sanctioned plunder. 3

At Iolcus, Jason confronts Pelias. Thaumas's rhetoric and Hera's intervention prevent Pelias from simply eliminating him, while Athena offers Jason the path that defines his legend: captaincy of the Argo and the quest for the Golden Fleece. 12 13 15

Captain of the Argo

Jason oversees the Argo's construction, though he repeatedly evades work and suffers retaliation from his future crew. 55

When Thaumas returns, Jason reunites with him enthusiastically and declares that the Argo will sail even without divine aid. His ability to gather heroes is recognized by the crew, while Thaumas becomes the expedition's de facto first mate. 93 98

On the voyage, Jason's flaws remain apparent: he indulges on Lemnos and dismisses Thaumas's warnings, yet he can recognize danger and mobilize the crew when necessary. 95

At Colchis, Jason accepts Thaumas's proposal to borrow rather than steal the Golden Fleece, then swears to return it on a later voyage. 105

Resistance Against the Gods

After Thaumas vanishes, Jason returns the Golden Fleece and regathers heroes for a prolonged rebellion against the gods. The Argonauts survive repeated setbacks for ten years, with Jason's leadership planting the foundation for humanity's later resistance. 116 118

Before the assault on Olympus, Jason orders Medea to survive at the cost of betraying and beheading him, believing that someone must carry Thaumas's legacy forward. 118

Trojan War

Summoned by Thaumas as a Rider-class Servant, Jason becomes commander of a 100,000-man Greek allied army. Thaumas defers to his military judgment, while Jason treats the campaign as his chance to fulfill the promise he made to his friend. 173 174

Jason captures Thebes through a night assault, helps surround Troy, and teaches Thaumas the practical realities of war. 175 177

When Athena permits action against Hector, Jason refuses to let Thaumas bear the burden alone. He deploys Glorious Sea of Splendor and Shining Ship That Tears the Sky, summons the Argonauts, and defeats Hector at the cost of his Spirit Origin. 177

Notable Quotes

“I'm the one who'll become the most dazzling hero in the entire world!” 2

“I may be an incompetent king, but I am the greatest captain in the world!” 177

“Damn it, Captain Jason has already caught up to your stride! We went down the mountain together, so why did you run so far ahead?!” 177

Trivia

• Jason and Thaumas skipped Chiron's lessons together; Jason later informed Chiron, earning Thaumas's resentment. 1
• He is four years older than Thaumas. 3
• Jason's confidence rises dramatically when Heracles and Thaumas are both present; he even imagines challenging Olympus. 93
• His Noble Phantasm's summoned Argonauts physically punish him while transferring the cost of its activation across the crew. 177