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Bryn2.png This Servant is a Limited Servant Limited.png. They are only available during special summoning campaigns. When no such campaigns are active, this Servant cannot be summoned.

This article is for Class-Berserker-Gold.png Mysterious Heroine X (Alter). For 4★ Class-Foreigner-Gold.png, see Mysterious Idol X (Alter). For 5★ Class-Assassin-Gold.png, see Mysterious Heroine X.

Servant Dialogue Interlude Strengthen Trial Quest
Class-Berserker-Gold.png
★ ★ ★ ★ ★

Mysterious Heroine X (Alter)

Japanese Name: 謎のヒロインX〔オルタ〕
AKA: MHX Alter, MHXA, Ecchan
ID: 155 Cost: 16
ATK: 1,717 / 11,113 HP: 2,079 / 14,175
Lv.100 Grail ATK: 12,165 Lv.100 Grail HP: 15,529
Lv.120 Grail ATK: 14,279 Lv.120 Grail HP: 18,251
Voice Actor: Kawasumi Ayako Illustrator: BUNBUN
Attribute: Star Growth Curve: Semi S
Critabsup.png Star Absorption: 9 Stargainup.png Star Generation: 5%
Npchargeup.png NP Charge ATK: 1.07% NPGainUpDmg.png NP Charge DEF: 5%
Instapowerup.png Death Rate: 37.3% Alignments: Neutral・Evil
Gender: Female
Traits: Arthur, Dragon, Female, Hominidae Servant, Humanoid, King, Round Table Knight, Saberface, Servant
QQABB.png
Hits:  Quick Hits3  |  Arts Hits2  |  Buster Hits4  |  Extra Hits5
Active Skills Passive Skills Append Skills Noble Phantasm Ascension
Skill Upgrade Bond Level Biography Trivia Images

Active Skills

Available from the start
Heal.png
Increases own healing received for 3 turns.
Recovers own HP.
Level 1 2 3 4 5 6 7 8 9 10
Healpowup.png Heal Rate + 20% 23% 26% 29% 32% 35% 38% 41% 44% 50%
HealEffect.png Heal + 1000 1100 1200 1300 1400 1500 1600 1700 1800 2000
Cooldown 7 6 5

Upgrades after Interlude 1, Replaces ∞ Black Bean Paste EX
Heal.png
Increases own healing received for 3 turns.
Recovers own HP.
Hpregen.png Recovers own HP by 1000 every turn for 3 turns. UpgradeIconText.png
Increases own critical damage of Quickmini.png Quick Cards for 1 attack, 3 turns. UpgradeIconText.png
Increases own critical damage of Artsmini.png Arts Cards for 1 attack, 3 turns. UpgradeIconText.png
Increases own critical damage of Bustermini.png Buster Cards for 1 attack, 3 turns. UpgradeIconText.png
Level 1 2 3 4 5 6 7 8 9 10
Healpowup.png Heal Rate + 20% 23% 26% 29% 32% 35% 38% 41% 44% 50%
HealEffect.png Heal + 1000 1100 1200 1300 1400 1500 1600 1700 1800 2000
Critdmgup.png Quick Crit Damage + 20% 21% 22% 23% 24% 25% 26% 27% 28% 30%
Critdmgup.png Arts Crit Damage + 20% 21% 22% 23% 24% 25% 26% 27% 28% 30%
Critdmgup.png Buster Crit Damage + 20% 21% 22% 23% 24% 25% 26% 27% 28% 30%
Cooldown 7 6 5

Unlocks after 1st Ascension
CritStar.png
Gains critical stars.
Level 1 2 3 4 5 6 7 8 9 10
GainStars.png Stars + 4 5 6 7 8 9 10 11 12 14
Cooldown 7 6 5

Upgrades after Strengthen 1, Replaces Instinct C
Quickup.png
Increases own Quick performance for 3 turns. UpgradeIconText.png
Gains critical stars. UpgradeIconText.png
Level 1 2 3 4 5 6 7 8 9 10
Quickupstatus.png Quick + 20% 21% 22% 23% 24% 25% 26% 27% 28% 30%
GainStars.png Stars + 10 11 12 13 14 15 16 17 18 20
Cooldown 7 6 5

Unlocks after 3rd Ascension
CritAbsorbDown.png
Starabsoprtdown.png Reduces one ally's critical star absorption by 100% for 1 turn.
Increases party's attack for 3 turns.
Level 1 2 3 4 5 6 7 8 9 10
Attackup.png Attack + 10% 11% 12% 13% 14% 15% 16% 17% 18% 20%
Cooldown 7 6 5

Passive Skills

1
Madness.png
Mad Enhancement C
Busterupstatus.png Increases own Buster performance by 6%.
2


Debuffres.png
Altereactor A
Resistanceup.png Increases own debuff resistance by 20%.

Append Skills

Unlocks by consuming Servant Coins
Damageup.png
Extra Attack Finesse Improvement
Increases own Extra Attack performance.
Level 1 2 3 4 5 6 7 8 9 10
Powerup.pngNpchargeup.pngStargainup.png Extra Attack + 30% 32% 34% 36% 38% 40% 42% 44% 46% 50%

Unlocks by consuming Servant Coins
Startnp.png
Mana Loading
Starts battle with NP gauge.
Level 1 2 3 4 5 6 7 8 9 10
NpCharge.png NP + 10% 11% 12% 13% 14% 15% 16% 17% 18% 20%

Unlocks by consuming Servant Coins
Criticalchanceresup.png
Anti-Assassin Critical Attack Chance Resistance
Increases own critical attack chance resistance against Class-Assassin-Gold.png Assassin enemies.
Level 1 2 3 4 5 6 7 8 9 10
Critchanceresup.png vs. Assassin Crit Chance Res + 20% 21% 22% 23% 24% 25% 26% 27% 28% 30%

Noble Phantasm

Cross Calibur
Black Dragon Twinblade of Victory

Quick.png
Base Damage: x0.8
Rank Noble Phantasm Type
A+ Anti-Unit
Hits Per Hit Percentage
9 2%, 4%, 6%, 8%, 11%, 13%, 15%, 17%, 24%
Effect Deals damage to one enemy. PreUpgradeIconTitle.png
NP Level 1 2 3 4 5
Powerup.png Damage + 1200% 1600% 1800% 1900% 2000%
Overcharge Effect Deals extra damage to Saber Class Servant enemies.
Charge 100% 200% 300% 400% 500%
Powerup.png Extra Damage x 150% 162.5% 175% 187.5% 200%

Upgrades after Strengthen 2

Cross Calibur
Black Dragon Twinblade of Victory

Quick.png
Base Damage: x0.8
Rank Noble Phantasm Type
EX Anti-Unit
Hits Per Hit Percentage
9 2%, 4%, 6%, 8%, 11%, 13%, 15%, 17%, 24%
Effect Powerup.png Increases own damage against enemies with Good Alignments by 50% for 1 turn. (Activates first) UpgradeIconText.png
Deals damage to one enemy. UpgradeIconText.png
NP Level 1 2 3 4 5
Powerup.png Damage + 1600% 2000% 2200% 2300% 2400%
Overcharge Effect Deals extra damage to Saber Class Servant enemies.
Charge 100% 200% 300% 400% 500%
Powerup.png Extra Damage x 150% 162.5% 175% 187.5% 200%

Ascension

Item 1 Item 2 Item 3 Item 4 QP
1st Berserker piece.png5 QPicon.png100,000
2nd Berserker piece.png12 Dragon Fang18 QPicon.png300,000
3rd Berserker monument.png5 Medal of Great Knight20 Primordial Lanugo3 QPicon.png1,000,000
4th Berserker monument.png12 Primordial Lanugo6 Dragon's Reverse Scale5 QPicon.png3,000,000


Skill Reinforcement

Item 1 Item 2 Item 3 Item 4 QP
1st Shining_Gem_of_Madness5 QPicon.png200,000
2nd Shining_Gem_of_Madness12 QPicon.png400,000
3rd Magic Gem of Madness5 QPicon.png1,200,000
4th Magic Gem of Madness12 Medal of Great Knight10 QPicon.png1,600,000
5th Secretberserker.png5 Medal of Great Knight20 QPicon.png4,000,000
6th Secretberserker.png12 Dragon Fang12 QPicon.png5,000,000
7th Dragon Fang24 Black Tallow4 QPicon.png10,000,000
8th Black Tallow11 Cursed Beast Cholecyst10 QPicon.png12,000,000
9th Crystallized lore.png1 QPicon.png20,000,000

Item 1 Item 2 Item 3 Item 4 QP
1st Shining_Gem_of_Madness5 QPicon.png200,000
2nd Shining_Gem_of_Madness12 QPicon.png400,000
3rd Magic Gem of Madness5 QPicon.png1,200,000
4th Magic Gem of Madness12 Primordial Lanugo3 QPicon.png1,600,000
5th Secretberserker.png5 Primordial Lanugo6 QPicon.png4,000,000
6th Secretberserker.png12 Dragon's Reverse Scale2 QPicon.png5,000,000
7th Dragon's Reverse Scale4 DawnlightReactorCoreIcon.png4 QPicon.png10,000,000
8th DawnlightReactorCoreIcon.png11 Comet Shard.png10 QPicon.png12,000,000
9th Crystallized lore.png1 QPicon.png20,000,000

Stats

Strength: A
Stats5.png
Endurance: B
Stats4.png
Agility: B
Stats4.png
Mana: A+
Stats5.png
Luck: C
Stats3.png
NP: A++
Stats5.png

Bond Level

Bond Level 1 BoundLevel1.png 2 BoundLevel2.png 3 BoundLevel3.png 4 BoundLevel4.png 5 BoundLevel5.png 6 BoundLevel6.png 7 BoundLevel7.png 8 BoundLevel8.png 9 BoundLevel9.png 10 BoundLevel10.png
Bond Required 2,000 3,000 4,000 5,000 6,000 230,000 250,000 300,000 380,000 438,000
Total Bond 2,000 5,000 9,000 14,000 20,000 250,000 500,000 800,000 1,180,000 1,618,000
Bond 10 Reward 429icon.png Dark Knight-Kun
When equipped on Mysterious Heroine X (Alter),
Increases Party’s damage to Class-Saber-Gold.png Saber enemies by 20% while she is on the field.
BoundLevel15.png
Chaldean Visionary Flames [?]
11 BoundLevel1.png 12 BoundLevel2.png 13 BoundLevel3.png 14 BoundLevel4.png 15 BoundLevel5.png
1,090,000 1,230,000 1,360,000 1,500,000 1,640,000
2,708,000 3,938,000 5,298,000 6,798,000 8,438,000


Biography

Unlock Description Translation🛈
Default サーヴァントユニヴァースより来訪した天涯孤独のヴィラン(悪役)。

世にも珍しい文系のバーサーカー。
魔力転換がオルトリアクターを燃やし謎のヒロインXの打倒を誓う、対・対セイバー用決戦兵器。

もう訳が分からない、だって?
───考えるな。感じるんだ。

NA Localization: A visiting villain from the Servant Universe.
Orphaned and alone, she is a Berserker bookworm with a burning Mana Conversion Altereactor Engine for a heart.
An Ultimate Anti-Anti Saber Weapon, sworn to defeat Mysterious Heroine X at all costs.

"What the heck are you talking about?"
...Don't think. Feel.

Fan Translation: A Villain (antagonist), the last of her kind, on a visit from the Servant Universe.
A hard-to-come-by literary Berserker.
An Anti-Anti-Saber final weapon who swears to defeat Mysterious Heroine X whilst fuelling her magical energy converter, the Altreactor.

You don't know what's going on anymore, you say?
---Don't think. Feel.

Bond 1 没落の騎士ペンドラゴン卿

身長/体重:154cm・42kg
出典:2017年バレンタインイベント
地域:サーヴァント界
属性:中立・悪  性別:女性
じまんのつるぎ『邪聖剣ネクロカリバー』はあやしいつうはんでかった。

NA Localization: The fallen knight, Lord Pendragon.
Height/Weight: 154cm, 42kg
Origin: 2019 Valentine's Day Event
Region: The Servant Universe
Attributes:Neutral-Evil   
Gender: Female
Her prized Evil Sacred Sword Necro-calibur was purchased from a shady online shop.

Fan Translation: Fallen Knight Sir Pendragon
Height/Weight: 154 cm / 42 kg
Source: 2017 Valentine's Event
Region: Servant World
Alignment: Neutral・Evil

Gender: Female
Her prided sword, ‘Wicked Holy Sword Necrocalibur’, was bought online from a shady vendor.

Bond 2 「闘うよ。ヒロインXを倒し、

 宇宙をヴィランの闇色に染める、その日まで」

そう誓う彼女をヴォロイド“K6ーX4”
通称“黒騎士くん”はいつも陰から見守っている。
適当に隠れてサボっているとも言う。

NA Localization: "I'll fight. Until the day I defeat Heroine X and paint the galaxy with the Villains' darkness."

Her trusty Voloid K6-X4, a.k.a. "Mini Black Knight," watches over her as she shouts her declaration. One could also say that the Voloid is just goofing off on the job.

Fan Translation: ‘I'll fight. Until the day I defeat Heroine X,
and stain the universe with the darkness of villainy.’

The voroid ‘K6-X4’—a.k.a. ‘Black Knight-kun’—is always watching over the girl and her oath from the shadows.
In other words, he's hiding away and being lazy on a whim.

Bond 3 まじめでひかえめな態度の少女。

好物は甘味。隙あらば高級和菓子を所望してくる。
割と金のかかる腹ぺこ。
オフの日は黒い円卓型のこたつから一歩も出ず、読書をしたり音楽を聞いたりして過ごす。

基本ずぼらで面倒くさがり。
他人からの命令や指図には、皮肉を返しつつもそれなりに素直に従うのは不思議。
甘い物で釣ると早い。

NA Localization: A young girl who is serious and reserved.
Her favorite food is anything sweet. Given the opportunity, she asks for high-end Japanese sweets. Since she's always hungry, it can get expensive.
On her days off, she does not move one step from the Black Round Table kotatsu, preferring to spend her time reading or listening to music.

She is a bit of a slob and she finds most things to be bothersome.
While she responds with sarcasm whenever someone gives her orders, she is, oddly enough, quite obedient.
It's easy if you bribe her with sweet things.

Fan Translation: A serious and reticent young girl.
Has a sweet tooth. If you give her the chance, she'll request luxury Japanese sweets.
A relatively costly glutton.
On days off, she doesn't take a single step away from the Black Round Table-type kotatsu.

There, she spends her day reading books and listening to music.
She's basically a slob who can't be bothered.
Curiously, she will follow orders and instructions, obedient in her own way, albeit served with a side of sarcastic retorts.
Bait her with sweets to get her going.

Bond 4 魔力転換炉オルトリアクターは、体内に秘めるオルタニウム結晶を触媒として、カロリーを魔力へ変換する。

「和三盆の成分バランスが最大効率です。あとお茶もほしいです」と彼女は強調する。
眼鏡はブーストされた視神経を休ませるために必要なアイテム。掛ける間はむしろ視力が落ちる。

彼女が所持している謎のアイテム「∞(インフィニティ)黒餡子」は欲求(ソウル)、糖分(パワー)、売り場(スペース)、原価(リアリティ)、製作(タイム)、需要(マインド)という六つの原始力によって作られたもので、持つ者に無限の力を与えるというがX・オルタはよく分かっていない。

NA Localization: An Alternium crystal embedded within her Mana Conversion Altereactor Engine converts calories into magical energy.
"Japanese Wasanbon sugar's elemental balance has the best conversion rate. Oh, and I want green tea," she emphasizes.
Her glasses are a necessity, to rest her boosted optic nerves. When she wears them, her vision actually gets worse.

She possesses a mysterious item called "∞ (Infinity) Black Bean Paste." It is made from the six atomic energies: desire (soul), sugar (power), store (space), SRP (reality), production (time), and demand (mind). It is said to grant its owner infinite power, but X Alter doesn't really get it.

Fan Translation: The magical energy converter, the Altreactor, converts calories into magical energy, the Alternium crystals hidden in her body acting as a catalyst.
‘The component balance of wasanbon sugar is the most effective. Also, I'll have some green tea,’ she emphasizes.
Spectacles are a necessary item to rest her boosted optic nerves. In fact, her eyesight deteriorates when putting them on.

The mysterious item in her possession, the ‘∞ (Infinity) Black Bean Paste’, was made through the six fundamental forces of
Desire (Soul), Sugar (Power),
Sales Location (Space), Cost Price (Reality),
Production (Time), and Demand (Mind).
Although said to grant infinite power to its wielder, X Alter doesn't really have a clue.

Bond 5 すでに壊滅し失われた暗黒の騎士団ダーク・ラウンズに連なる最後の生き残り。

付与されし称号はペンドラゴン卿。

念動力“オルタ・チョーク”、腕先から魔力を放出する絶技“オルト・ライトニング”など、どこかで見たような多彩な技を駆使する。
赤い魔力を放つ“邪聖剣ネクロカリバー”はツインブレードやチェーンソーなど自在に変形するが、よく壊れて爆発する。
格好いい武器ほどあまり強くない、というのは宇宙共通の掟らしい。
やはり何の変哲もないロングソードこそ至高。

NA Localization: The last successor of the now-annihilated dark chivalric order, the Dark R.O.U.N.D.S.
Her given title is Lord Pendragon.

She has various special moves, such as her telekinetic "Alter Choke" and the "Alter Lightning" she shoots from her fingers. Both look a little familiar.
Her Evil Sacred Sword Necro-calibur, which emits red magical energy, can freely change its form. Twin blades or even a chainsaw form are possible, but it often breaks and explodes.
"The cooler a weapon looks, the weaker it is," seems to be the common understanding across all the universe.
Ultimately, a regular longsword is a safer bet.

Fan Translation: The last survivor of an annihilated and lost order of dark knights, the Dark Rounds.
The title bestowed on her is Sir Pendragon.

She employs a variety of strangely familiar techniques such as the psychokinetic "Alter Choke" and the ultimate technique ‘Alter Lightning’, which releases magical energy from the forearms.
Emitting crimson magical energy, the ‘Wicked Holy Sword Necrocalibur’ can be transformed into a twinblade or chainsaw at will, but frequently breaks and blows up.
It seems to be a universal law
that cool weapons aren't very powerful.
All said and done, nothing beats the standard longsword.

Clear Interlude
Extra 「謎のヒロインX」から抽出されたX因子を元に、禁断の魔術によって錬成された人造サーヴァント。

本能的にヒロインXを排除しようとするが、その原因がオルタゆえの自己嫌悪と自己破壊の感情にあるとは本人も気づいていない。
暴走する危険な衝動は、良きマスターを持つことで安定をみせるかもしれない。

NA Localization: A synthetic Servant who was molded through forbidden magecraft by extracting the X gene from Mysterious Heroine X. She instinctively tries to rid herself of Heroine X, but she is unaware that her reason for doing so is the self-loathing and self-destructive tendencies of an Alter.

The impulses that make her tend to go out of control may be held in check by a good Master.

Fan Translation: An artificial Servant created by forbidden magic, based on the X factor extracted from Mysterious Heroine X.
Even though it tries to eliminate Heroine X instinctively, that person isn't aware that these feelings of self-loathing and self-destruction lies in her Alter nature.
Her dangerous impulses to run amok may stay stable if the Master is a kind one.

April Fool アルトリアサーヴァント

遠い宇宙からやってきた暗黒の食いしん坊。
和菓子のためなら地球を守ってもいいと言う。ライトノベルが大好き。  

Artoria-Type Servant

A girl pledged to the dark side who has a huge appetite. She is from a galaxy far, far away. So long as she's provided with Japanese sweets, she will protect Earth with all her might. Loves to read light novels.


Availability

Mysterious Heroine X (Alter) was available for summoning during the:

Valentine 2017 Summoning Campaign Fes.2017~2nd Anniversary~Lucky Bag New Year 2018 Lucky Bag Summoning Campaign
Valentine 2017 Summoning Campaign Re-Run Fes.2018~3rd Anniversary~Lucky Bag New Year Lucky-Bag Summoning Campaign 2019
16M Downloads Campaign Fate/Grand Order Fes. 2019 ~4th Anniversary~
Lucky Bag Summoning Campaign
Saber Wars II Summoning Campaign 2
New Year Lucky-Bag Summoning Campaign 2020 Fate/Grand Order ~5th Anniversary~ Lucky Bag Summoning Campaign Lucky Bag 2021 Summoning Campaign New Year Special
Grail Live Fate/Grand Order ~6th Anniversary~ Lucky Bag Summoning Campaign

Trivia

  • Saber Class Servant is defined as a Trait. Therefore, as for the extra damage of her Noble Phantasm, "Servants whose original class is Saber but has been changed to a different class" are also effective. However, "Servants whose original class is not a Saber but has been changed to a Saber class" are NOT effective.
  • Mysterious Heroine X (Alter) is the Otaku Version of Mysterious Heroine X from April Fool. Rather than having the same personality, what they have is the opposite.
  • She is 6th Class Alter Servant (Berserker) and she is also first ★5 Artoria Alter Servant.
  • Prior to her appearance in the game she was mentioned in FGO material as "「謎のセーラーX」".
  • The original idea of "Infinity Chocolate" is Marvel's Infinity Stones and Infinity Gauntlet.
  • オルト・ライトニング (Alter Lightning) is the name of her lightning attack.
    • オルト・ライトニング (Alter Lightning) and her double-bladed lightsaber is a parody of Red Lightning and the double-bladed lightsaber used by Darth Maul in Star Wars.
  • Her Extra Attack animation is also a parody of Star Wars Episode 1 when Darth Maul killed Qui-Gon Jinn.
  • Her third skill Sovereign's Invisible Hand is her "オルタ・チョーク" (Alter Choke), parody of Darth Vader's Force Choke in Star Wars.

Images

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