|Also known as:||A-X|
|Appears in:|| Fate/Extella|
|Japanese VA:||Ayako Kawasumi|
|Character type:||Servant (Master: Protagonist)|
|Place of Origin:||Servant Universe|
|Addresses self as:||Watashi (私, ?)|
“The Artoria Species is like a cancer of the universe.
Someone must reap them out.
—Mysterious Heroine X
Assassin's True Name is Mysterious Heroine X (謎のヒロインＸ, Nazo no Hiroin?), also known as Heroine X (ヒロインＸ, Hiroin X?) and just X, an unknown heroine who tasked herself in eliminating Saber-class heroines during Back Alley Satsuki - Chapter Heroine Sanctuary. Bearing the code name "A-X", X was a stranger who came from the "mysterious dimension" called the Servant Universe (サーヴァントユニヴァース, Sāvanto Yunivāsu?). Seeking to accomplish her "true, dearest wish" to "defeat all Sabers", she brandished Secretcalibur and left her home town, leaving behind an "expression full of bitterness."
Even before arriving at Chaldea, she managed to save an ancient royal dynasty from a crisis, settle the internal strife of the "Mankind Integration Union", and rout invaders from another universe, but such actions were trivial enough for her to not even remember accomplishing them. She will continue to brandish her sword until her goal is completed, and can still be seen "dashing across the sea of stars" even today. No matter what, she also plans to cut down the "Golden Great Emperor Cosmo Gilgamesh."
X has revealed to none that her true identity is actually Artoria Pendragon. While she believes that her "perfect disguise" has tricked everyone, it is asked that others keep the fact quiet to keep from spoiling it and also for the sake of X's own honor.
“It's sticking out...it's sticking out...it's really sticking out.”
—Assassin's profile, on her ahoge
Assassin's appearance is said to be composed of "rough and sporty garments unseemly for Servants." Her blue muffler is a symbol of courage, and her cap is used to hide her identity and ahoge, although it sticks out of the cap.
Mystery Heroine X's wish for the Holy Grail is the destruction of all other sabers. Or at least for them to change their class name to Attacker or Swordsman or something.
- Saber Class
- Mysterious Sailor X
SABER WARS – Lily’s Cosmic Training – The Caliburn AwakensEdit
Salomon: The Grand Time TempleEdit
Musashi Trial QuestEdit
Assassin claims to be the "definitive edition of the Saber Class", acting as an Anti-Saber Decisive Weapon (対セイバー決戦兵器, Tai-Seibā Kessen Heiki?) that "fairly and squarely performs surprise attacks as a knight." She brandishes the "mysterious magic sword" Secretcalibur to massacre her enemies and uses her favorite ship, the Dun Stallion II (ドゥ・スタリオンⅡ, Du Sutarion II?), to travel through space.
Her Riding ability. She can't ride every possible ride-able object, but when it comes to managing ordinary spaceships, this skill displays a terrific effect. To the point where she can warp even using a ship with no warp function.
Due to a mysterious communication device, the Du Stallion can automatically provide Back-up Fire (支援砲撃, Shien Hōgeki?). In a one-on-one fight between fellow swordsmen, there are no unexplored territories nor soulful tactics.
Galactic Meteor Sword (銀河流星剣, Ginga Ryūsei-ken?) is a power given to Saber that can destroy even stars. Also known as the sword that absolutely kills Sabers. Its attack is super effective against Sabers, so would it be an exaggeration to say that she is the greatest Saber of all?
Ultra Heroine ZEdit
Ultra Heroine Z (ウルトラヒロインZ, Urutora Hiroin Z?) is an alternate version of Mysterious Heroine X who acts as the antagonist of the "Saber Wars" event.
Creation and ConceptionEdit
She makes her first appearance in 2013 April Fools.
Nasu Kinoko is the scenario writer for Mysterious Heroine X in Fate/Grand Order. Takashi Takeuchi is the character designer for Mysterious Heroine X. BUNBUN is the character illustrator for Assassin.
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28
 Fate/Grand Order material III - CHARACTER profile: Mysterious Heroine X, p.114-123 [T]
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 Fate/Grand Order - Mysterious Heroine X Profile, Translated by Master of Chaos.
- ↑ Fate/Grand Order - Salomon: The Grand Time Temple - Act 09: X / Disposal Chute Andromalius
- ↑ Fate/Grand Order - Mysterious Heroine X interlude 01: Saber Slayer: Dawn
- ↑ Fate/Grand Order - Mysterious Heroine X interlude 02: Saber Slayer: Clash
- ↑ Fate/Grand Order - Mysterious Heroine X interlude 03: Saber Slayer: Awakening