Caster / Medea

Caster stands at 152 cm in height and weighs 44 kg.

Her signature look features a robe that she can transform into butterfly-like wings, allowing her to float gracefully.

She gives off an ethereal, almost doll-like aura, accentuated by her calm and composed facial expressions.

Caster is soft-spoken, introverted, and deeply romantic at heart, often hiding her true feelings.

She values sincerity and dislikes people who take things for granted.

Although she usually appears withdrawn and prefers tranquil or solitary environments, she harbors a hidden warmth towards close companions.

She is serious and can be difficult to joke with, but her loyalty to those she trusts is unwavering.

Every year she makes an effort to travel after being inspired by words from a close friend, marking small but important changes in her life.

Caster is summoned as a Servant during a collaboration event in Fate/Grand Order, originating from the story "Witch on the Holy Night."

She is a rare magus who does not age and carries with her the legacy of her mother's magical lineage, holding various powerful and mysterious relics.

Known in the modern era as a top-tier magus, her capabilities nearly parallel those of true sorcerers, making her one of the most formidable magic users in existence.

She was invited to a spiritual hotspot as an exorcist owing to her skills, though she tends to laze around, much to others’ disbelief.

Caster has outstanding magical power, with parameters: Strength E, Endurance B+, Agility E, Mana A++, Luck A, Noble Phantasm A+.

She excels in territory and tool creation, rivaling even legends in her field.

Her unique skill "Legend Immunity" grants damage reduction from all non-legendary attacks and prevents modern weaponry from harming her—only countered by methods found in legends.

Another signature trait is her spiritual construct familiars known as "Proi," used creatively in battle.

Her Noble Phantasms manifest as whimsical, formidable fairy-tale monsters that turn forgotten relics into loyal servants or envelop entire areas in deadly, mysterious mists.

She boasts multiple forms of revival, including a special Guts effect, making her very hard to kill.

On the battlefield, she can swiftly charge her Noble Phantasms, protect herself from powerful enemy moves, and devastate foes with person-targeted and human-specific effects.

Her supernatural survivability even allows her to resurrect repeatedly unless struck down by an act of love.

Caster shares a complicated bond with Aoko Aozaki, her former roommate and occasional rival; she both relies on her and is exasperated by her antics.

She has a visiting arrangement with Soujurou Shizuki, whose sincerity she finds surprising and quietly intriguing.

She had fleeting interactions with Tobimaru Tsukiji and Yosuke Kinomi, acquaintances from her school days.

Her familiar, Lost Robin Round, serves as her loyal companion and occasional substitute, even taking fatal blows on her behalf.

Fujimaru Ritsuka, her master in the current era, inspires both caution and reluctant admiration from her.

She is drawn to other fairy-tale-themed magi like Nursery Rhyme and Hans Christian Andersen, and holds high regard for the likes of Circe and the witch Medea.

She took a brief interest in modeling familiars after Elizabeth Bathory, but quickly decided it would be more trouble than it’s worth.

She recognizes Toneriko’s skill in fairy-tale magic as similar to her own, impressed by the independent mastery of complex arts.

Caster dislikes exaggeration in others but is herself a legend among magi for her powerful heritage and skills.

She has a soft spot for sincere, honest things (with few exceptions).

Despite her power, she endures ordinary annoyances—like being roped into vacationing at a haunted inn—much like anyone else.

Her main familiar, Lost Robin Round, is endlessly revived and never fails to dutifully take her place when danger looms.

Her abilities and magical constructs are treasures recognized by the Mage Association as being "more valuable than an entire kingdom."

During events, she has a unique and often comedic reaction to confusing new settings, such as bizarre castles made of pyramids and ancient mansions.

"Let's play make-believe."

"In faded dreams, pour the oil of the moon."

"This is the end for you. Welcome to our rose garden… Isn't that right, sweet Alice…?"

Summoning and Arrival

Caster is summoned as a five-star Caster-class Servant in Fate/Grand Order’s Witch on the Holy Night crossover event, tasked with investigating supernatural phenomena at a remote hot springs inn.

Although recruited for her strength as an exorcist, Caster is less proactive, preferring her tea over work.

The Fairy Tale Monsters' Power

Through her command over fairy-tale beasts—powerful magical constructs inherited from her mother—Caster manipulates her environment, raising broken objects to life and defending her territory with mystic power.

With her Grail-level Noble Phantasms, she can drag forgotten places back from memory and turn them into active, dangerous battlefields under her control.

The Witch's True Nature

Advancing through her journey and reaching her final form, Caster reveals a darker, more chaotic witch-like power.

She calls forth monstrous entities that sweep away entire cities in mist and blood, their forms inspired by classic fairy stories and legends of British lore.

The Bonds of the Present

As the case unfolds, Caster's interactions with her Master, her past friends, and even her familiar, show a quiet longing for connection beneath her mysterious demeanor.

Despite her standoffishness, her actions often speak to a deep sense of responsibility and care for those she holds close.

Throughout it all, Lost Robin Round, her ever-loyal familiar, provides comfort and comic relief, eagerly absorbing blows or standing by her side in battle.

Caster’s magical techniques combine both ancient and modern elements, resulting in tools, minions, and spells that can only be counteracted by equally legendary means.

Her endless revival, strategic intelligence, and resistance to modern threats make her a perplexing and formidable ally or adversary.

Whether participating in a stately ritual war or an eccentric vacation murder mystery, she brings an almost fairytale-like logic and endless mystique to any stage she graces.