Medea

Biodata

Feature	Details
Name	Medea (美蒂雅) 3
Alias(es)	Witch of Betrayal; Witch of Greece; ageless witch-princess of Colchis; Priestess of Hecate; Babalon’s priestess 14 32
Species/Race	Human; later recorded as a Heroic Spirit before being directly summoned into an actual body 130 134
Gender	Female 3
Affiliation	Hecate’s Temple; the Argonauts; Chaldea 3 21 134
Occupation/Role	Priestess, magus, princess and later witch of Colchis 3 49
Status	Active; directly removed from the Throne of Heroes and summoned into Chaldea in her complete body 130 134
First Appearance	Chapter 3 3

Power Progression

Stage / Realm / Level	Chapter	Notes
Priestess of Hecate	3	Introduced as Hecate’s temple priestess and student of the goddess of magic.
Battle-tested Age of Gods magus	9 16	Establishes a fortified Temple territory during the Gigantomachy, then demonstrates large-scale magical bombardment against Typhon’s Dragon Tooth Soldiers and dragons.
Perfect memory	12	Apollo grants her the ability to record everything and never forget, allowing her experiences to remain permanently useful.
Babalon’s priestess	14	A ritual involving Babalon grants her a second priestess identity and begins enhancing her body and magic; she demonstrates control over her own blood.
Apollo’s solar and light authority	19 20	Solves Apollo’s test and receives knowledge granting access to a portion of his sun and light authority, including offensive, restorative, blinding, and body-enhancement spells.
Heroic Spirit manifestation and Rule Breaker	32	As a Servant, gains access to the Noble Phantasm Rule Breaker, enabling her to sever contracts and thaumaturgy affecting its target.
Complete physical summoning	130 134	Mephistopheles uses the Blood Mother’s power to pull her true self from the Throne of Heroes; she manifests in her actual body rather than as a Servant.
1=10 grade	144	Blood Mother power develops into control over earth, air, water, fire, and Ether, supplemented by Thelemic knowledge. Mephistopheles judges her capable of suppressing top-tier Heroic Spirits and contending with a Grand Servant.

Background / History

Medea was a young priestess of Hecate’s temple in the Age of Gods and the daughter of Aeëtes, king of Colchis. She encountered Mephistopheles after his arrival in ancient Greece, initially approaching him with reserved curiosity before becoming attached to him and joining his travels with Hecate’s immediate approval. 3 5 6

Travel exposed her to events far beyond temple training. She helped diagnose Heracles’ madness, prepared a potion to cure it, and fought alongside the gods during the Gigantomachy. Apollo later rewarded her part in those events with perfect memory, ensuring her deeds and magical studies would continue to benefit her. 8 9 12

After returning from Olympus, Medea trained her territory construction with Artemis and underwent a ritual that made her Babalon’s priestess. She then fought Typhon’s creations at Mount Etna, personally exterminating thousands of Dragon Tooth Soldiers and Bone-Winged Dragons while earning dragon-slaying accomplishments. 14 16

Although Apollo foresaw a version of Medea who would be manipulated into betraying her family for the Golden Fleece, her path diverged through her relationship with Mephistopheles. During the Argonautic expedition, she assisted Jason through Aeëtes’ trials as part of a staged betrayal; Aeëtes forgave her, and Medea relinquished the throne to remain Colchis’ witch and guardian. 18 24 49

At a later point, she answered a Holy Grail War summoning in Fuyuki as Atrum Galliasta’s Servant. Disgusted by his use of children as magical fuel, she used Rule Breaker to free herself from his control, severed his arm, and took control of his workshop. 32

After thousands of years on the Throne of Heroes, Medea was directly summoned by Mephistopheles through the Blood Mother’s power. Her true body arrived in Chaldea with her full strength and accumulated magical knowledge intact. 130 134

Appearance

Medea first appears as a petite, youthful girl from the Age of Gods. By the time of her direct summoning to Chaldea, she manifests as a mature woman. 3 130

• Long purple hair 15
• Often wears a hooded outfit while manifested as a Servant 32
• Uses a wand or staff when constructing territories and casting large-scale spells 14 104
• Her mature manifestation retains the presence of the legendary witch of Greece rather than the appearance of an ordinary Servant construct 130 134

Personality

Medea is proud of her talent and openly calls herself a genius. Her confidence grows with each battle and blessing, eventually becoming certainty that she can protect Colchis and stand beside far stronger allies. 6 20

Beneath her pride, she is compassionate and emotionally direct. She comforts Megara, swears to cure Heracles’ madness in Hecate’s name, and becomes deeply distressed whenever Mephistopheles is endangered. 8 18

She can also be ruthless when confronting cruelty or threats. She rejects Atrum’s sacrifice of children, leaves him maimed after breaking their contract, and later eliminates enemy Servants before they can claim a Holy Grail. 32 104

Medea is secure in her relationship with Mephistopheles. Rather than resent Artemis becoming his partner, she accepts their bond and considers both herself and Artemis to be his wives in all but formal name. 20 131

Abilities & Skills

Hecate’s Magecraft

As Hecate’s priestess, Medea practices Age of Gods magic and possesses extensive knowledge of potion-making, magical formulae, and battlefield spellcasting.

• Prepared a potion that cured Heracles’ recurring madness. 8 9
• Uses magical arrows, explosive bombardment, ropes, fireballs, and concentrated fire attacks. 16 29 135
• Can identify and destroy the magical nodes sustaining constructed undead such as Dragon Tooth Soldiers. 16
• Created a massive magical-energy crystal without a chant while confronting Atrum. 32

Temple Territory

Medea can establish a Temple-like magical territory that turns the surrounding area into a fortified workshop.

• Embeds magical formulae throughout the area to accelerate her casting. 9
• Uses the territory as a defensive fortress and barrier against enemy attacks. 9 14
• Refined her territory through repeated sparring with Artemis, increasing its overall strength by more than half without increasing her magical power. 14
• Maintains familiar surveillance across Fuyuki, though excessive familiars consume enough mana to endanger her mana supplier. 48

Apollo’s Solar and Light Authority

Apollo’s test grants Medea knowledge connected to his authorities of light and the sun without requiring her to become his priestess. 19

• Long-range light-based attacks. 20
• Blinding techniques. 20
• Healing and physical reinforcement spells. 20
• Can strengthen her physically enough to engage monsters in close combat despite her naturally frail body. 20

Babalon and the Blood Mother

A ritual performed with Mephistopheles gives Medea a connection to Babalon, the supreme feminine power associated with Binah. 14

• Gains the identity of Babalon’s priestess. 14
• Demonstrates direct control over her blood, drawing it from her hand and returning it to her body. 14
• The Blood Mother’s power was hidden within her body and later allowed Mephistopheles to sever her connection to the Root and summon her true self from the Throne. 130
• At the 1=10 grade, her power manifests as control over earth, air, water, fire, and Ether. 144

Rule Breaker

Rule Breaker is Medea’s Noble Phantasm: a curved dagger that breaks thaumaturgy affecting the person it pierces and severs contracts. 32

• Used on herself to remove Atrum’s Command Spell restriction. 32
• Can terminate contractual bindings and similar magical effects. 32
• Its power enabled her to overthrow Atrum despite his attempt to command her into suicide. 32

Equipment / Weapons / Items

• Rule Breaker — Noble Phantasm dagger that breaks thaumaturgy and contracts. 32
• Wand — used for constructing and maintaining magical territory. 14
• Staff — used to gather and launch large numbers of magical arrows. 104

Relationships

• Mephistopheles — Traveling companion, lover, and the person who redirected her tragic future. They confessed their feelings in the divine realm; Medea later considers herself his wife and accepts his relationship with Artemis. 13 20 131
• Hecate — Teacher and patron goddess. Medea is her priestess, and their relationship remains openly affectionate even after Medea’s later travels. 3 6 104
• Artemis — Formerly wary of her, Medea becomes Artemis’ friend, training partner, and confidante. They coordinate effectively in combat and share a mutual relationship with Mephistopheles. 7 14 16 20
• Apollo — Benefactor who grants her perfect memory and later access to solar and light authority. 12 19
• Heracles — Ally whose madness Medea cures with her potion. They later fight on the same side during the Gigantomachy and travel with the Argonauts. 8 9 21
• Megara — Heracles’ wife, whom Medea reassures while promising to cure Heracles’ condition. 8
• Aeëtes — Medea’s father and king of Colchis. Her apparent betrayal during the Golden Fleece trials is ultimately staged, and he forgives her. 18 49
• Atrum Galliasta — Summoner and former Master in the Fuyuki Holy Grail War. Medea rejects his human sacrifices, breaks their contract, and leaves him bound in his own workshop. 32
• Sasaki Kojirou — Guard and associate during Medea’s Fuyuki operations. 44 48

Story Role / Major Arcs

Age of Gods Journey

Medea leaves Hecate’s temple with Mephistopheles to experience the wider world, with Artemis later joining them under the alias “Diana.” 6 7

Gigantomachy

She supports Heracles’ cure, establishes a fortified Temple territory at Phlegra Plain, and prepares to exploit weaknesses in the Gigantes after Mephistopheles exposes them. 8 9

Typhon and Mount Etna

Medea proves her growth by destroying Typhon’s forces in overwhelming numbers. When Mephistopheles and Artemis are swallowed by Typhon’s dying vortex, she immediately seeks Apollo’s aid. 16 18

Argonautic Expedition

Medea joins Jason’s voyage to Colchis with Mephistopheles and Artemis, preventing the expected version of her legend from unfolding unchanged. 20 21 49

Fuyuki Holy Grail War

Summoned by Atrum, Medea refuses to participate in his atrocities, uses Rule Breaker to escape his authority, and later expands her territory across Fuyuki City. 32 44

Chaldea

Mephistopheles summons Medea directly from the Throne of Heroes. In Chaldea, she resumes fighting beside him, develops the Blood Mother’s power, and reaches the 1=10 grade. 130 134 144

Notable Quotes

“No problems at all. After all, I’m a genius!” 6

“No problem. With me here, they won’t be able to rebel!” 20