X

Biodata

Feature	Information
Name	X
Alias(es)	Mysterious Heroine X; Artoria Pendragon; “Evil God Hunter from the Azure Galaxy”; Saber Combat Weapon 97 112
Species/Race	Artoria Species; a Servant-origin being from the Azure Galaxy 112 113
Gender	Female
Affiliation	Dragon Empire; later the Roman Pantheon 113 282
Occupation/Role	Assassin-class Servant; hunter of Artoria Species; maritime deity responsible for navigation and sea trade 75 114 282
Status	Active 282
First Appearance	Chapter 74 74

Power Progression

Stage / Realm / Level	Chapter	Notes
Heroine Series baseline	137	X is described as a top-tier Servant rather than an outlier in raw power, but her Heroine Series specialization makes her exceptionally dangerous against Sabers and other Artoria Species.
Near the Artoria Species’ limit	119	Other Artoria Species report that X suddenly grew powerful enough to approach their species’ limit after arriving on Earth.
Artoria-element amplification	142	The Artoria sub-element greatly accelerates an Artoria Species’ production of Artoria elements, particularly through intimate interaction with Arthur; X’s dramatic increase in strength is cited as proof of the effect.

Background / History

X originates from the Azure Galaxy, a technologically advanced Servant civilization. She arrived on Earth aboard the Dong Starion Unit 2, presenting herself to the Empire as an Evil God Hunter pursuing the “Evil God Artoria Species.” Arthur confirmed that her extraterrestrial origin was genuine, even if her dramatic presentation made the officials doubt her judgment. 112 113

Her stated mission is to eradicate Artoria Species—whom she broadly labels “evil Sabers”—so that she can become the sole Artoria. Arthur initially treats this obsession as harmless chuunibyou behavior, but later realizes that she is fully willing to kill other Artorias, including Omega. 111 129

Arthur persuades X to keep her anti-@@REF_ENTITY_5273683@@ operations secret, exploiting her trust by claiming that the Empire depends on her stealthy assistance. She becomes markedly quieter and more obedient afterward, while continuing to imagine herself as Arthur’s indispensable protector. 114

During the conflict with the Throne of Evil, X confronts her corrupted counterpart, X Alter. She attempts to reason with her rather than kill her, but is overwhelmed and badly injured. X Alter ultimately spares her because Arthur would be saddened by her death. 97 100

After the arrival of numerous Artoria Species on Earth, X’s campaign becomes a genuine threat. She kills Omega immediately after Omega abandons her attempt on Arthur’s life, demonstrating that X’s Saber-hunting ideology is not merely theatrical. X is subsequently detained alongside XX, expresses remorse, and promises Arthur to behave better. 129 133

X later participates in Arthur’s effort to contact and consolidate the Artoria factions. She is sent alongside XX to find the Knights of the Round Table and Dark Round Table, is kidnapped by Ultimate Heroine Z, and eventually takes part in the Artoria Species’ battle royale. 137 140 146

The Lion King defeats and eliminates X from the competition by piercing her heart with Rhongomyniad, after X’s Light Cannon attack fails to stop her. X nevertheless remains among Arthur’s Artoria allies in later eras, ultimately receiving authority over the sea, navigation, and maritime trade within the Roman Pantheon. 152 282

Appearance

X resembles an Artoria variant and favors an energetic, casual style over knightly formalwear. At Orleans, she wears a blue-and-gray tracksuit jacket over a crop top, shorts, and sneakers; she is also associated with a dark-blue baseball cap and a prominent ahoge. 111 129 140

• Blue-themed casual clothing, contrasting with the darker armor and clothing of Alter variants. 97 140
• Carries herself with conspicuous enthusiasm, often striking exaggerated poses or standing on tables while making announcements. 112
• Wields an azure Holy Sword, which can split into a second, ominous red Magic Sword in battle. 130

Personality

X is energetic, impulsive, and intensely theatrical. She frames her life as a heroic crusade against “evil gods,” treats ordinary events as covert operations, and readily believes Arthur when he validates her mission. 112 114

Despite her grandiose behavior, X is emotionally straightforward. She is fiercely possessive of Arthur, regards him as her child, and becomes jealous when she sees him with the Einzbern maids. Her concern for Galahad and panic during Arthur’s danger also show that her protectiveness is sincere. 75 91 97

Her defining flaw is her indiscriminate prejudice against Artoria Species. X can show affection toward people close to Arthur, yet regards other versions of herself as targets to be eliminated. The death of Omega reveals the lethal consequences of this conviction. 129

Abilities & Skills

Assassin-Class Stealth

Although X often imagines herself as a Saber, she is an Assassin-class Servant and possesses stealth-oriented abilities. 75 114

• Agrees to conduct covert operations against Artoria Species after Arthur orders her to avoid public declarations. 114
• Her self-image as a frontal “Saber of Sabers” frequently conflicts with her actual Assassin classification. 114 136

Heroine Series Saber Specialization

X belongs to the Heroine Series, a subspecies specifically suited to fighting Sabers and Artoria Species. 137

• Can engage several Artoria Species at once and retreat safely even when unable to win outright. 137
• Her specialization allows a group of Heroine Series members to suppress forces several times their number. 137
• Her raw strength is described as top-tier Servant level rather than true outlier level. 137

Holy Sword Combat

X is a capable close-range fighter who uses twin sword techniques and adapts her weapons during battle. 97 130 146

• Uses the Nameless Victory Sword against X Alter. 97
• Can manifest a secondary dark-red Magic Sword alongside her azure Holy Sword. 130
• Fought Arthur in close combat during the Artoria Species battle royale, though his Pure White Twin Swords suppressed her. 146
• Was ultimately defeated by the Lion King after failing to finish her with a Light Cannon. 152

Artoria Element Enhancement

X’s strength rises sharply through the Artoria element connected to Arthur. 119 142

• Her enhanced state is reported to be close to the limit attainable by an Artoria Species. 119
• The Artoria sub-element accelerates element production by dozens or hundreds of times, with further acceleration during intimate interaction with Arthur. 142
• This growth makes Arthur a strategic resource for the Servant Universe’s Artoria Species. 142

Equipment / Weapons / Items

• Nameless Victory Sword — X’s Holy Sword, used against X Alter. 97
• Dark-red Magic Sword — a second sword manifested alongside her primary azure blade. 130
• Dong Starion Unit 2 — X’s spaceship from the Azure Galaxy; Empire researchers later begin dismantling it, prompting her protest. 113 114
• Artoria postcards — X gives Arthur a stack of postcards featuring herself as supposed protection against being “tempted” by Artoria Species. 129

Relationships

• Arthur / Artorius Pendragon — X’s beloved “child”; she is presented as his mother or “Father King,” and is intensely protective and possessive of him. Arthur cares for her but repeatedly restrains or redirects her anti-@@REF_ENTITY_5273683@@ crusade. 75 91 114 133
• XX — an older or future counterpart of X. XX regards X with nostalgic affection and responsibility, while X initially sees XX as another Artoria Species to defeat. 129 130 140
• X Alter — a counterpart with whom X shares a significant bond. X tries to save her from corruption, while X Alter spares X out of consideration for Arthur. 97 100
• Omega — an Artoria Species who confesses her mistaken motives to Arthur; X kills her for being an “evil” Artoria Species. 129
• Ultimate Heroine Z — enemy leader who kidnaps X and leads the Protagonist variants against other Artoria factions. 138 140
• Lion King — fellow Artoria leader who defeats X during the battle royale. 152
• Artoria Pendragon — another Artoria counterpart assigned to work alongside X; their partnership begins tensely due to X’s speed and anti-Saber fixation. 136 138

Story Role / Major Arcs

• Holy Grail War conflict — Plays with Illya, clashes with Arthur over his relationship with the Einzbern maids, and acts as his anxious mother figure. 74 75
• Throne of Evil battle — Fights X Alter while attempting to bring her back to her senses; survives despite being decisively outmatched. 97 100
• Artoria Species arrival — Reveals her Azure Galaxy origin and urges the Empire to help her hunt Artoria Species. 112 113
• Artoria Species conflict — Kills Omega, is temporarily detained by Arthur, then assists in locating the rival Artoria factions. 129 133 137
• Artoria battle royale — Fights Arthur, then is eliminated by the Lion King. 146 152
• Roman Pantheon era — Receives dominion over the sea, navigation, and maritime commerce. 282

Notable Quotes

“Fellow Knights of the Round Table! I am the Evil God Hunter from the Azure Galaxy, the Saber Combat Weapon, Mysterious Heroine X!” 112

“Of course, I’m eliminating the evil Artoria Species, eliminating the evil Sabers.” 129

Trivia

• X considers herself a Saber despite being an Assassin-class Servant with Stealth. 114
• She once proposes that Arthur look at postcards of herself to avoid being attracted to other Artoria Species. 129
• X’s strength becomes a major reason the Artoria Species believe that whoever possesses Arthur can become their strongest member. 142