AssassinIntroduction
Mysterious Heroine X is a 5-star servant in Fate/Grand Order with the Star attribute. Mysterious Heroine X's class is Assassin.
On the combined Fate/Grand Order tier list Mysterious Heroine X is B tier, 207th of the 363 servants ranked, from where 3 community tier lists put Mysterious Heroine X.
Other servants in Fate/Grand Order with the Star attribute: Altria Caster, Altria Caster (Berserker), Archetype Earth, Attila the San(ta), BB Dubai, Bedivere and 20 more.
Mysterious Heroine X's banners
All banners- 22 April 2025 to 28 April 2025"Pilgrimage Festival: Part 2" Mysterious Heroine X Pickup Summon
- 12 July 2024 to 14 July 20247th Anniversary Mysterious Heroine X Pickup Summon
- 1 November 2023 to 9 November 2023Revival: GUDAGUDA Yamataikoku 2022 Mysterious Heroine X Pickup Summon
- 12 January 2023 to 26 January 2023Revival: SABER WARS 2 Pickup 2 Summon
- 13 October 2021 to 1 November 2021SABER WARS 2 Pre-Release Pickup Summon
- 20 November 2020 to 30 November 2020Thanksgiving 2020 Pickup Summon (Daily)
Profile
Mysterious Heroine X is voiced by Ayako Kawasumi in Japanese. BUNBUN drew her.
Stories
7Character details
The Servant Universe.
That's where the stranger claims she's from.
She calls herself "Saber: the Definitive Edition."
Through a combination of fair duels and assassinations, she's the ultimate Anti-Saber weapon.
Codename: A-X.
Profile 1
Height/Weight: 154cm, 42kg
Origin: April Fools Day, 2013
Region: The Servant Universe
Alignment: Chaotic-Good
Sub-Attribute: Star
Gender: Female
I will kill everyone using my sword, the "Secret Calibur."
Profile 2
"Altria-Types are like a cancer on the world, someone must eradicate them, someone must..."
With determination in her heart, Heroine X left her home and rides the Du Stallion II through the starry ocean.
Profile 3
Her look is too rough and sporty for a typical Servant.
Her scarf is a symbol of courage, and her hat conceals her face and her ahoge.
But it's still poking out, oh it's definitely poking out.
Profile 4
As the Anti-Saber weapon, my only purpose is to defeat Sabers with my sword and my will.
But, I opened up my heart to Saber Lily.
Profile 5
Until she came here, she was saving an ancient dynasty, solving the internal quarrels of the Human Alliance Union, and dispersing intruders from other universes.
However, she doesn't remember any of this, because to her, such deeds are ordinary.
Until her long-time goal is achieved, she will continue to wield her Secret Calibur.
She will also cut down the Golden Emperor, Gilgamesh, as many times as she needs to.
Additional profile
Don't tell anybody, but her true identity is Altria Pendragon.
She thought her perfect disguise had tricked everyone.
Please don't say anything about who she really is, for the sake of spoilers and her honor.
Stats
- HP166th of 41912,696
- ATK70th of 41911,761
- Star generation1st of 41925.6%
- Star absorption212th of 41998
- Death rate286th of 41938.5%
- NP gain per hit118th of 4190.81%
- NP gain when hit4%
At level 90. Each bar is measured against the highest value in the Fate/Grand Order roster, and the place is out of every servant with that stat, lowest first for Death rate.
HP and ATK by level
- HP
- ATK
Level 90 is the natural cap for a 5-star; 100 takes 10 Holy Grails and 120 another 20 grails plus Servant Coins, before Fou cards (up to 2,000 HP and 2,000 ATK) and Craft Essences.
Cards and generation
- Arts hits
- 2 (33/67%)
- Extra hits
- 4 (9/18/27/46%)
- Quick hits
- 4 (10/20/30/40%)
- Buster hits
- 1 (100%)
- Star generation
- 25.6%
- Star absorption
- 98
- Death rate
- 38.5%
- Party cost
- 16
- NP gain per hit (Arts / Quick / Buster / Extra)
- 0.81% / 0.81% / 0.81% / 0.81%
- NP gain when hit
- 4%
Skills
3
Fire Support XEX EX
Skill 1 (strengthened)LevelDecrease DEF (3 turns) for all enemies + After 1 turn, medium chance to inflict Stun to all enemies (1 turn)
- DEF Down (all enemies, 3 turns)
- 20%
- Fire Support Set (self, 1 turn)
- 930001
- Cooldown
- 7 turns
Star of Saber C++
Skill 2 (strengthened)LevelApply Invincible (1 turn) for yourself + Gain a large amount of Critical Stars
- C. Star Gain (self)
- 20
- Critical Rate Up (self, 2 turns)
- 25%
- Cooldown
- 5 turns
Galactic Meteor Sword XEX A
Skill 3 (strengthened)LevelSignificantly increase C. Star Drop Rate against [Saber] enemies (3 turns) & apply Special Attack [Saber] (3 turns) & increase ATK (3 turns) for yourself
- C. Star Drop Rate Up vs. Saber (self, 3 turns)
- 100%
- Critical Rate Up vs. Saber (self, 3 turns)
- 30%
- STR Up vs. Saber (self, 3 turns)
- 50%
- ATK Up (self, 3 turns)
- 20%
- Cooldown
- 6 turns
Before the strengthening quests (3)
Fire Support EX
Skill 1LevelMedium chance to apply Stun (1 turn) for all enemies 1 turn later
- Fire Support Set (self, 1 turn)
- 930001
- Cooldown
- 8 turns
Intuition C+
Skill 2LevelGain a large amount of Critical Stars
- C. Star Gain (self)
- 14
- Critical Rate Up (self, 2 turns)
- 20%
- Cooldown
- 5 turns
Galactic Meteor Sword C
Skill 3LevelSignificantly increase C. Star Drop Rate against [Saber] enemies (3 turns) & apply Special Attack [Saber] (3 turns) for yourself
- C. Star Drop Rate Up vs. Saber (self, 3 turns)
- 100%
- Critical Rate Up vs. Saber (self, 3 turns)
- 30%
- STR Up vs. Saber (self, 3 turns)
- 50%
- Cooldown
- 6 turns
Noble Phantasm
Secret Calibur
Rank EX · Anti-Personnel · 12 hits · strengthenedDeal significant damage to an [Altria Face] enemy <Special Attack damage increases with Overcharge>
- Damage (extra against the target trait) (one enemy)
- 2400%
Before the strengthening quest
Secret Calibur
Rank A+ · Anti-Personnel · 12 hitsDeal significant damage to an [Altria Face] enemy <Special Attack damage increases with Overcharge>
- Damage (extra against the target trait) (one enemy)
- 2000%
Class and append skills
Increase your C. Star Drop Rate
- C. Star Drop Rate Up
- 10%
- Critical Rate Up
- 10%
Increase your Quick Card effectiveness
- Quick Up
- 12%
Increase Extra Attack Card's effectiveness by 50% for yourself
Begin battle with NP charged at 20% for yourself
Increase ATK against [Saber] class by 30% for yourself
Increase Critical Strength by 30% for yourself
Apply a state that "reduces skill cooldown by 1 after using it" (1 time <2 times at Lv. 6-9, 3 times at Lv. 10>, goes into effect only 1 time per skill)
Ascensions and costumes
5
Ascension 1
Ascension 2
Ascension 3
Ascension 4- Simple Spiritron Dress: Mysterious Heroine ZUnlock at "Dress Making" in Da Vinci Workshop
Materials
Ascension
- Ascension 1Materials:
Assassin Piece x5QP: 100,000 QP - Ascension 2Materials: Assassin Piece x12
Dragon Fang x18QP: 300,000 QP - Ascension 3Materials:
Assassin Monument x5
Phoenix Feather x8
Dragon's Reverse Scale x2QP: 1,000,000 QP - Ascension 4Materials: Assassin Monument x12Dragon's Reverse Scale x4
Proof of Hero x36QP: 3,000,000 QP
4,400,000 QP for all four ascensions.
Skill enhancement (one skill)
- Level 1 to 2Materials:
Gem of Assassin x5QP: 200,000 QP - Level 2 to 3Materials: Gem of Assassin x12QP: 400,000 QP
- Level 3 to 4Materials:
Magic Gem of Assassin x5QP: 1,200,000 QP - Level 4 to 5Materials: Magic Gem of Assassin x12Phoenix Feather x4QP: 1,600,000 QP
- Level 5 to 6Materials:
Secret Gem of Assassin x5Phoenix Feather x8QP: 4,000,000 QP - Level 6 to 7Materials: Secret Gem of Assassin x12Dragon Fang x12QP: 5,000,000 QP
- Level 7 to 8Materials: Dragon Fang x24
Void's Dust x12QP: 10,000,000 QP - Level 8 to 9Materials: Void's Dust x36
Octuplet Crystals x24QP: 12,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 20,000,000 QP
54,400,000 QP to take one skill from 1 to 10, 163,200,000 QP for all three. Append skills share the same table for their levels, paid in the same materials plus Servant Coins to unlock.
Append skill enhancement (one skill)
- Level 1 to 2Materials: Gem of Assassin x5QP: 200,000 QP
- Level 2 to 3Materials: Gem of Assassin x12QP: 400,000 QP
- Level 3 to 4Materials: Magic Gem of Assassin x5QP: 1,200,000 QP
- Level 4 to 5Materials: Magic Gem of Assassin x12
Great Knight Medal x10QP: 1,600,000 QP - Level 5 to 6Materials: Secret Gem of Assassin x5Great Knight Medal x20QP: 4,000,000 QP
- Level 6 to 7Materials: Secret Gem of Assassin x12Dragon's Reverse Scale x2QP: 5,000,000 QP
- Level 7 to 8Materials: Dragon's Reverse Scale x4
Reactor Core of Dawn x4QP: 10,000,000 QP - Level 8 to 9Materials: Reactor Core of Dawn x11
Fragment of a Twinkling Star x10QP: 12,000,000 QP - Level 9 to 10Materials: Crystallized Lore x1QP: 20,000,000 QP
Palingenesis (Holy Grails)
- 1Level cap: 92QP: 10,000,000 QP
- 2Level cap: 94QP: 11,000,000 QP
- 3Level cap: 96QP: 12,000,000 QP
- 4Level cap: 98QP: 13,000,000 QP
- 5Level cap: 100QP: 15,000,000 QP
- 6Level cap: 102QP: 15,000,000 QP
- 7Level cap: 104QP: 15,000,000 QP
- 8Level cap: 106QP: 15,000,000 QP
- 9Level cap: 108QP: 15,000,000 QP
- 10Level cap: 110QP: 15,000,000 QP
- 11Level cap: 112QP: 15,000,000 QP
- 12Level cap: 114QP: 15,000,000 QP
- 13Level cap: 116QP: 15,000,000 QP
- 14Level cap: 118QP: 15,000,000 QP
- 15Level cap: 120QP: 0 QP
Each summon of this servant gives 90 Servant Coins.
Bond
- 12,000Bond 2: 19,000Bond 3: 25,000Bond 4: 27,500Bond 5: 320,000Bond 6: 680,000Bond 7: 1,020,000Bond 8: 1,340,000Bond 9: 1,655,000Bond 10: 2,745,000
Total bond points to reach each level.
Apply Special Attack [Saber] (increase damage by 20%) for all allies only if Mysterious Heroine X (Assassin) is equipped with this Craft Essence when she is on the field.
Voice lines
93Home (20)
- Birthday
- Congratulations. I give you my blessing as a representative of the Sabers.
- During an Event
- It seems something is happening, Master.
- Conversation 1
- Now, Master. The next Saber is waiting.
- Conversation 2
- As long as you are my Master, I will serve you as a Saber. Huh, Assassin? What do you mean?
- Conversation 3
- I'm not an Assassin, I'm determined to be a Saber.
- Likes
- A righteous Holy Grail War. In other words, one where Saber is the most powerful Class. Why, this invincible, wonderful feeling of winning continuously must be the ideal form of the Holy Grail War.
- Dislikes
- What I dislike? All other Sabers.
- About the Holy Grail
- I have only one wish. Until then I will not lose to anyone.
- Bond Level 1
- Are there any other Sabers around?
- Bond Level 2
- I'm going on patrol. Please keep a strict watch so that the number of Sabers doesn't increase.
- Bond Level 3
- Well, even if there are any other Sabers, you would still choose me, wouldn't you Master?
- Bond Level 4
- ...Even if there are other Sabers out there, it doesn't change the fact that I am Master's strongest sword.
- Bond Level 5
- Yes, I don't care about any other Sabers. All that matters is that I am a sword. A sword for you, Master...
- Conversation 4
- You've finally shown yourself, Red! Let's go! Excalibur!
- Conversation 5
- You've finally shown yourself, my delinquent son! Now, here's the punishment for destroying the castle walls!
- Conversation 6
- I...Impossible! He's...a Saber...with a body like that?
- Conversation 7
- Yes, yes... Even though there are more Sabers, there's more me now, too. However, I just can't let those two sacred lance wielders run amok! No... I mustn't allow it! How'd they grow so much anyway!?
- Conversation 8
- What!? Ex is here!? And she's angry about someone organizing her room? I need Japanese sweets, quick! It's the only way to calm her rage! It'll be okay. She's a total sucker for these things.
- Conversation 9
- Now that I think about it, I've come a really long way! I never imagined my hunt for the endless number of Sabers would go on for so long... This will all be for naught unless they make something like a feature-length anime about me!
- Conversation 10
- Altrium is an amazing metal! It's lighter than aluminum, harder than diamond, and shinier than gold! It is mainly mined from the Planet Avalon.
Home (20)
- Bond Level 1
- Are there any other Sabers around?
- Bond Level 2
- I'm going on patrol. Please keep a strict watch so that the number of Sabers doesn't increase.
- Bond Level 3
- Well, even if there are any other Sabers, you would still choose me, wouldn't you Master?
- Bond Level 4
- ...Even if there are other Sabers out there, it doesn't change the fact that I am Master's strongest sword.
- Bond Level 5
- Yes, I don't care about any other Sabers. All that matters is that I am a sword. A sword for you, Master...
- Conversation 1
- Now, Master. The next Saber is waiting.
- Conversation 2
- As long as you are my Master, I will serve you as a Saber. Huh, Assassin? What do you mean?
- Conversation 3
- I'm not an Assassin, I'm determined to be a Saber.
- Likes
- A righteous Holy Grail War. In other words, one where Saber is the most powerful Class. Why, this invincible, wonderful feeling of winning continuously must be the ideal form of the Holy Grail War.
- Dislikes
- What I dislike? All other Sabers.
- About the Holy Grail
- I have only one wish. Until then I will not lose to anyone.
- Conversation 4
- You've finally shown yourself, Red! Let's go! Excalibur!
- Conversation 5
- You've finally shown yourself, my delinquent son! Now, here's the punishment for destroying the castle walls!
- Conversation 6
- I...Impossible! He's...a Saber...with a body like that?
- Conversation 7
- Yes, yes... Even though there are more Sabers, there's more me now, too. However, I just can't let those two sacred lance wielders run amok! No... I mustn't allow it! How'd they grow so much anyway!?
- Conversation 8
- What!? Ex is here!? And she's angry about someone organizing her room? I need Japanese sweets, quick! It's the only way to calm her rage! It'll be okay. She's a total sucker for these things.
- Conversation 9
- Now that I think about it, I've come a really long way! I never imagined my hunt for the endless number of Sabers would go on for so long... This will all be for naught unless they make something like a feature-length anime about me!
- Conversation 10
- Altrium is an amazing metal! It's lighter than aluminum, harder than diamond, and shinier than gold! It is mainly mined from the Planet Avalon.
- During an Event
- It seems something is happening, Master.
- Birthday
- Congratulations. I give you my blessing as a representative of the Sabers.
Growth (5)
- Level up
- I am diligent in my training in order to stand at the top of all Sabers!
- Ascension 2
- Thank you. I also made some progress on modding my Holy Sword.
- Ascension 1
- It is a strange experience to become a completely different version of oneself. [id 601800_0_G031]Initially, it was only a feeling of despair, but it has become more enjoyable.
- Ascension 3
- For you to have done so much for me... [id 601800_0_G041]S-somehow makes me feel guilty for my motives... [id 601800_0_G042]Ahaha...
- Ascension 4
- Please look, Master! My new form! [id 601800_0_G051]I won't focus on such a petty goal as defeating all Altria-face Sabers anymore! [id 601800_0_G052]My new goal is to become the strongest Saber and to be useful to you!
Growth (1)
- Level up
- I am diligent in my training in order to stand at the top of all Sabers!
First summon (1)
- Summon
- ...The code name is Heroine X. I am a Servant summoned in response to the recent social problems involving an increasing number of Sabers. It is nice to meet you.
Treasure Device (12)
- SABER WARS - The Caliburn Awakens - 1
- The road to becoming a Saber was not built in a day! Early to bed, early to rise, commitment to eating vegetables, and plenty of rest!
- SABER WARS - The Caliburn Awakens - 2
- How's it going with the repair work? Even though it is a pain to do, thank you, Master of Earth.
- SABER WARS - The Caliburn Awakens - 3
- My spaceship is still in disrepair... It seems second-hand parts are useless, huh... I'd sure like the new model of Venus Fort's V8 Cosmo Engine...
- SABER WARS - The Caliburn Awakens - 4
- Before anything else, first read the instruction manual. By checking the information and announcements I have become a first-class Saber-killer!
- SABER WARS - The Caliburn Awakens - 5
- Even so, it's cold, right? ...Steamed Buns... Red-Bean Soup... Crepes... Stew... Doner Kebabs...
- SABER WARS - The Caliburn Awakens - 6
- Even though a lot of things have happened, it was good training wasn't it? Du Stallion II couldn't be repaired in the end, but I'll pick up all the extra parts. Don't forget to exchange them.
- Revival: SABER WARS - The Caliburn Awakens - 1
- The road to becoming a Saber was not built in a day! Early to bed, early to rise, commitment to eating vegetables, and plenty of rest!
- Revival: SABER WARS - The Caliburn Awakens - 2
- How's it going with the repair work? Even though it is a pain to do, thank you, Master of Earth.
- Revival: SABER WARS - The Caliburn Awakens - 3
- My spaceship is still in disrepair... It seems second-hand parts are useless, huh... I'd sure like the new model of Venus Fort's V8 Cosmo Engine...
- Revival: SABER WARS - The Caliburn Awakens - 4
- Before anything else, first read the instruction manual. By checking the information and announcements I have become a first-class Saber-killer!
- Revival: SABER WARS - The Caliburn Awakens - 5
- Even so, it's cold, right? ...Steamed Buns... Red-Bean Soup... Crepes... Stew... Doner Kebabs...
- Revival: SABER WARS - The Caliburn Awakens - 6
- Thanks to you, the repairs are completed! Once the trajectories are calibrated, I'm going to blast out of here with my rocket. So I'm gonna stock up on provisions while I can!
Event (27)
- Attack 1
- Hyah!
- Attack 2
- Yahh!
- Attack 3
- There!
- Attack 4
- I'm just testing the waters!
- Attack 5
- Too slow... I'm SUPER fast!
- Extra Attack 1
- I'll beat up every other Saber!
- Extra Attack 2
- Decisive Strike!
- Extra Attack 3
- Saber Home Run!
- Skill 1
- Try this.
- Skill 2
- Well then!
- Skill 3
- Thank you for the food! Seconds, please!
- Skill 4
- Thank you for the food! More, mooore!
- Skill 5
- Thank you for the food! Oh wooow!
- Skill 6
- Come on, secondary Noble Phantasm...Galactic Meteor Sword!
- Battle Start 1
- Saber detected. I'll defeat you.
- Battle Start 2
- Saber discovered. I'll dispose of you as part of my job.
- Victory 1
- Sigh. Another Saber, other than me, has disappeared.
- Victory 2
- ...If I meet a Saber I will kill a Saber. If I meet a god I will kill a god. Especially gods who keep summoning Sabers!
- Damage 2
- Ouch!
- Damage 1
- What!
- Incapacitated 1
- I can't die until I finish killing all Sabers...
- Incapacitated 2
- Defeat... Saber...
- Command Card 1
- Hyah!
- Command Card 2
- Quickly!
- Command Card 3
- Saber!
- Noble Phantasm Card {0}
- All other Sabers must die.
- Noble Phantasm Card {0}
- ...It's your mistake for thinking of me as an Assassin.
My Room (2)
- Noble Phantasm {0}
- Oh Sword of Starlight. The red ones, black ones,[delay 3] and white ones must be destroyed! [id 601800_0_B052]Keep this a secret. Excalibur!
- Noble Phantasm {0}
- Light and darkness cross to reveal Sabers! [id 601800_0_B801]Cataphract shift! [id 601800_0_B802]Feel the power of kingship...Excalibur!
Bond (5)
- Revival: SABER WARS - The Caliburn Awakens - 7
- There's an item exchange shop this time around, so make sure you use it! Don't worry! I've got TONS of experience working part-time jobs!
- Revival: SABER WARS - The Caliburn Awakens - 8
- Things on this planet sure are strange... Its space technology is ranked E, but for some reason their food and recreational tech is A-ranked! ...How'd that happen?
- Revival: SABER WARS - The Caliburn Awakens - 9
- Here you go. This is perfect for any class, except Sabers. Actually, I'd like you to keep all Sabers, other than me, in their first Ascensions.
- Revival: SABER WARS - The Caliburn Awakens - 10
- Oh, more materials? I can't help but notice you keep exchanging for things that don't taste good... I didn't expect all the items I prepared as jokes would sell out first, while my highly recommended Space Noodles and Cosmic Burgers wouldn't sell at all... ...Well, it doesn't matter, because I'm gonna eat them anyway!
- Revival: SABER WARS - The Caliburn Awakens - 11
- Sorry, but the mysterious item exchange shop is closed! I want to get out of here soon! Well, you can still do some exchanging, so if you have anything left over, I'll buy it off you. After all, lending aid and scavenging for supplies is the norm in outer space.
Voiced by Ayako Kawasumi. Illustrated by BUNBUN.
Costumes
1Simple Spiritron Dress: Mysterious Heroine Z
X from a parallel world born from the Saber saturation phenomenon, considered bizarre even by Mysterious Heroine X's standards.
Art
