Grey

Name: Grey

Gender: Female

Age: 24

Date of Birth: February 20

Height: 159 cm

Blood Type: AB

Likes: Transforming and fully acting as the person she becomes, milk

Magic Attribute: Transformation (later revealed as Alchemical / Transmutation-type magic)

Grey is extremely shy and socially anxious, to the point that she cannot appear in front of others in her true form unless she is transformed.

Despite this, she is kind-hearted and deeply considerate of her comrades’ feelings.

Inside the Black Bulls’ hideout she usually transforms into a huge, ominous giant with its face hidden in shadow to avoid showing her real appearance.

When she must talk to strangers or deal with other people on missions, she often transforms into other Black Bull members and behaves in an exaggerated, clownish way to disguise her nervousness.

After her face is revealed during the battle in the undersea temple, she decides she must be her true self in front of her comrades.

From that point on, she makes an effort to communicate with the Black Bulls without hiding behind a transformation.

She has very low self-confidence due to her past abuse, but she is fiercely loyal to those who accept her, especially Gauche Adlai and the Black Bulls.

Her shyness contrasts sharply with the enormous, reality-bending power of her magic, giving her character a strong “hidden genius” feel.

Grey was born into a noble family.

However, she was relentlessly bullied and abused by her stepmother and stepsisters, who treated her as an outsider and inferior.

Unable to endure the mistreatment, she ran away from home.

While she was on the run, she was nearly attacked by bandits or robbers.

At that desperate moment, she was saved by Gauche Adlai.

Because he became the one who literally changed the course of her life, she feels a deep sense of gratitude and emotional debt toward him.

This encounter and his acceptance of her gave her the courage to start changing herself.

Her later decision to show her real face to the Black Bulls is heavily rooted in this early turning point.

Overall Nature of Her Magic

Grey’s magic is initially described and treated as simple “Transformation Magic.”

Most magic knights can only use transformation magic to alter their own appearance or bodily features.

In her case, Owen later suggests that her ability is not standard transformation magic at all but an entirely different classification.

He names her true magic “Alchemical Magic” or “Transmutation Magic,” as it can alter the very nature of matter and even magic itself.

Her magic is powerful enough that, once it manifests in full, she is classified as belonging to the Underworld Class, an extraordinary tier among mages.

Her abilities can affect not just herself but external matter, other people’s magic, and even living bodies at a fundamental level.

Transformation Magic

On the surface, Grey uses “Transformation Magic” to change her own appearance.

This allows her to take on forms such as a towering, faceless giant or perfect copies of her fellow Black Bulls.

Unlike normal transformation users, she later displays the ability to transform external objects as well.

This foreshadows the revelation that her magic is actually a wide-ranging transmutation power rather than simple disguise.

Magic Convert (Magic Convert)

Name: Magic Convert

Grey can transform someone else’s magic into a different attribute or type.

Instead of just disguising her own body, she “re-writes” the nature of another mage’s spell.

She cannot use Magic Convert while she herself is in a transformed state.

In battle, she therefore often cancels her disguise to wield this ability at full power.

She first awakens Magic Convert thanks to advice from Gauche Adlai during the undersea temple battle.

This spell becomes one of her signatures, allowing her to turn enemy attacks into harmless forms or supportive effects for allies.

Unnamed Recovery Technique

Grey also develops a powerful, unnamed recovery technique that can save the life of someone who has suffered a fatal or near-fatal wound.

Rather than classical healing, she is actually transforming or converting the damaged or destroyed material into an intact state.

This technique is strong enough to stabilize people on the brink of death.

It highlights how her magic manipulates the core structure of matter, not just its outer appearance.

Undersea Temple Battle and Revelation of Her Face

During the battle at the undersea temple, Grey fights alongside the Black Bulls and receives guidance from Gauche Adlai.

It is in this confrontation that she first masters Magic Convert, shifting magic properties mid-combat.

In the course of this fight, her true face is accidentally revealed to her teammates.

Although this deeply embarrasses her, it becomes the catalyst for her decision to stop hiding from her comrades and live as her real self among them.

Discovery of Her Underworld Class Nature

After she uses her powers to heal Grey (the other Black Bull member) from serious injuries, the true nature of her magic is exposed.

It is recognized that she belongs to the Underworld Class and that her magic is a never-before-seen form of alchemical transmutation.

Owen formally identifies her spell type as Alchemical Magic.

From this point, her previously “simple” transformation is reinterpreted as matter and magic conversion on a deep level.

Before the Royal Knights’ Raid on the Eye of the Midnight Sun

Grey herself is not selected to participate in the Royal Knights selection exam.

However, she plays a crucial role shortly before the Royal Knights arrive at the Eye of the Midnight Sun’s base.

A few hours before the Royal Knights reach the White Night Eye’s hideout, Rades Spirito, Valtos, and Sally launch a surprise attack on the Black Bulls’ base.

Grey joins forces with Gauche Adlai, Gordon Agrippa, and Henry Legolant to repel this assault.

Her ability to transform and convert magic makes her a key support in disrupting the enemy’s spells and protecting the base.

This moment shows that even if she is not officially chosen for elite units, she is vital to the Black Bulls’ defense.

Battle Against the Reincarnated Gauche and Drowa

When Gauche becomes the reincarnation vessel for Drowa and attacks the Black Bulls together with Eclat, Grey enters the fight alongside Asta, Grey (the wounded comrade previously healed), and Henry Legolant.

Their goal is to break the reincarnation and free Gauche from Drowa’s control.

In this conflict, Grey’s Magic Convert becomes essential as she uses it to transform and redirect Drowa’s magic.

By altering harmful spells into safer or supportive forms, she provides crucial backup to her allies.

Her support plays a part in guiding the battle toward the eventual release of Gauche from Drowa’s control.

It also continues to highlight how versatile and battlefield-shaping her alchemical powers can be.

Dante Zogratis’ Invasion of the Black Bulls’ Base

During Dante Zogratis’ sudden attack on the Black Bulls’ hideout, Gauche Adlai suffers a life-threatening wound.

Driven by her desperate wish to save him, Grey’s magic evolves even further.

She uses her power to completely erase the stone sword that is impaled in Gauche’s body.

Immediately afterward, she transforms the damaged tissue and wound area, effectively sealing and restoring it.

This moment acts as the full emergence of her unnamed recovery-style transmutation.

Although she manages to save Gauche’s life, they ultimately fail to prevent Dante from kidnapping Yami Sukehiro, who intervenes mid-battle.

Confrontation with Nacht Faust

Later, when Nacht Faust harshly criticizes and insults the Black Bulls, Grey stands up to him.

She tells him she does not want people to be judged solely by their appearance.

Nacht dismisses her plea without much consideration and brushes her aside.

Still, this moment shows Grey’s growing courage and willingness to speak her mind even to intimidating authority figures.

Battle Against the Spade Kingdom and Morris

During the war against the Spade Kingdom, Grey joins the Black Bulls as they rush to the battlefield.

There, they confront Morris, who has formed a contract with the devil Lucifero.

Morris’ magic is extremely dangerous, but Grey uses Magic Convert in precise coordination with Gauche Adlai.

Together, they neutralize and nullify Morris’ magic, robbing him of his overwhelming advantage.

This teamwork with Gauche reinforces their emotional bond and mutual trust.

It also demonstrates that Grey’s power is now indispensable in high-level conflicts, turning enemy magic into something the Black Bulls can withstand or counter.

Gauche Adlai

Gauche Adlai is the person Grey owes the most.

He saved her when she ran away from home and was almost killed by bandits.

Because of this, she holds a deep gratitude and emotional attachment toward him.

His support and advice, particularly during the undersea temple battle, help her awaken new aspects of her magic and her confidence.

Their later teamwork against Morris and in other battles shows a strong, growing partnership.

For Grey, Gauche is both a savior figure and a central emotional anchor within the Black Bulls.

Black Bulls

The Black Bulls become Grey’s true family after her oppressive life as a noble.

Although she initially hides her face and uses transformations to interact with them, they accept her even after seeing her real appearance.

This acceptance pushes her to be more honest and open as a person.

In return, she uses her rare alchemical magic to protect them again and again, proving that even a timid person can be a decisive hero on the battlefield.