A handsome young hero from Iolkus who is sent on a seemingly impossible quest to retrieve the Golden Fleece. While he gathers a formidable crew and secures divine favor, he frequently battles anxiety and self-doubt regarding his leadership. He relies heavily on the strength of his comrades and the intervention of goddesses to overcome obstacles.

A young princess of Colchis and a priestess of the goddess Hekate. She possesses formidable skills in sorcery and potion-making. Struck by an arrow from Eros, she suffers a torturous internal struggle between her sudden, overwhelming love for Jason and her loyalty to her father and homeland.

The archetypal, immensely powerful Greek hero who joins the crew of the Argo. Though the other heroes unanimously wish for him to lead the quest, he respectfully defers the position to Jason. He represents a traditional, martial form of heroism and serves as a motivational force for the crew when they become distracted.

The fierce and belligerent king of Colchis who guards the Golden Fleece. Believing the arriving heroes intend to steal his power, he refuses to hand over the fleece peacefully, instead setting a series of deadly, impossible tasks involving fire-breathing bulls and earth-born warriors.

A phenomenally gifted musician and son of the Muse Calliope. He uses his divine musical abilities to maintain peace among the crew, set the rowing rhythm for the ship, and protect his fellow heroes from supernatural auditory threats.

A steadfast and courageous hero from Pythia traveling aboard the Argo. He frequently steps forward to offer practical solutions and rally the crew when Jason falters or predicts disaster. He maintains a strained relationship with his estranged wife, the sea nymph Thetis.

The king of Iolkus who views Jason as a threat to his throne. To eliminate this perceived danger, he tasks the young man with the seemingly impossible mission of retrieving the Golden Fleece from Colchis.

A boastful and aggressive member of the Argonauts. He frequently expresses disdain for diplomacy or reliance on the gods, preferring sheer martial force and mocking those he views as cowardly.

A prophet traveling with the Argonauts. He values proper reverence for the gods and clashes with the more arrogant members of the crew who rely solely on physical strength.

A fiercely loyal hero and brother to Peleus. He is quick to anger, particularly when he believes his comrades have been wronged, which leads to a severe argument with Jason over missing crew members early in the voyage.

The queen of Lemnos, an island where the women recently killed all their male relatives. She conceals this grim history from the Argonauts and attempts to persuade them to stay and live with her people.

A seer suffering a terrible punishment from Zeus for revealing divine prophecies too clearly. Blinded and continually starved by foul monsters, he offers crucial navigational advice to the Argonauts in exchange for their help.

One of the sons of Phrixos and Chalkiope. After being rescued by the Argonauts, he serves as a vital guide, leading them to Colchis and advising Jason on how to survive Aietes' dangerous court.

Aietes' daughter, Medea's sister, and the mother of Argos. Desperate to protect her sons from her father's wrath, she approaches Medea to beg for magical assistance on behalf of the Greek heroes.

The son of Aietes and brother of Medea. He acts as the military commander of the Colchian fleet, determined to block the Argonauts' escape routes and return his sister to their father.

The queen of the gods who deeply favors Jason because he once helped her cross a flooded stream. She actively orchestrates divine interventions, manipulating other deities and altering weather patterns to protect the Argonauts.

The goddess of wisdom and strategic warfare. She actively supports the expedition from its inception, collaborating with Hera to secure safe passage and success for the Greek heroes.

The goddess of love, who agrees to help Hera protect Jason. She functions as a somewhat exasperated mother to Eros, bribing the chaotic young god with toys to ensure he strikes Medea with a love-inducing arrow.

The youthful, impish god of love. Armed with his bow, he views causing romantic devastation as a game, striking Medea only after his mother promises him a special childhood toy of Zeus.

A powerful sorceress and the sister of Aietes. Living in exile, she performs sacred purification rituals for those stained by blood guilt, though she remains highly perceptive regarding the true nature of their crimes.

The queen of the Phaeacians, who takes immediate pity on the terrified Medea. She urges her husband to find a peaceful resolution that will protect the young woman from the pursuing Colchians.

The king of the Phaeacians, who wishes to avoid violence on his shores. He devises a legal compromise regarding Medea's fate, hinging his decision on whether she and Jason have officially married.

A brave Spartan hero traveling aboard the Argo. He readily steps forward to handle physical challenges that Jason hesitates to accept, engaging in brutal boxing matches and protecting the crew from hostile local rulers.

The hostile king of the Bebrykians who forces visitors into single combat. His aggressive posturing leads to a deadly confrontation with the Argonauts when they land on his shores.

A beautiful youth and close companion to Herakles. His captivating appearance draws the attention of a water nymph, an event that ultimately separates Herakles from the rest of the Argonauts.