

Introduction
Mysterious Idol X (Alter) is a 4-star servant in Fate/Grand Order with the Star attribute. Mysterious Idol X (Alter)'s class is Foreigner.
On the combined Fate/Grand Order tier list Mysterious Idol X (Alter) is B tier, 191st of the 363 servants ranked, from where 2 community tier lists put Mysterious Idol X (Alter).
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.
Profile
Mysterious Idol X (Alter) is voiced by Ayako Kawasumi in Japanese. BUNBUN drew her.
Stories
7Character details
The dress she wears for her concerts is imbued with wishes. Her voice, resonant with emotion, sings of impossible dreams.
Tonight, the girl transforms into an idol and makes her glorious debut on the dazzling battlefield (stage).
My song, my life full of passion...I want to convey them all to you, who I have yet to meet.
Release the Altereactor! Idol☆Glo at full force! Limit breakthrough...to the next stage!!!
Profile 1
Height/Weight: 154cm, 42kg
Origin: FGO Waltz Collaboration "Bedazzled! Grail Concert!"
Region: Servant Universe
Alignment: Neutral-Good
Sub-Attribute: Star
Gender: Female
The floating pod Little Black Knight is an independent platform. Its wicked comebacks now play in stereo!
Profile 2
The one who wandered into the Singularity where idols reign supreme was, in essence, the theatrical version of Ex. She is a little more emotional and active than the normal version, and it costs more to draw her.
She is a singing Foreigner who wants it all, as she handles the writing for both music and lyrics, singing and performing, and even fighting in battles!
Profile 3
But if you want to go further back, the original Mysterious Heroine X (Alter) originates from a reality TV show that was somewhat popular in the Servant Universe. In season 1, the School Arc, she formed an alliance with Mysterious Heroine X, while in season 2, the Villain Arc, she was a part of the Villains Coalition while striving to revive the Dark Rounds. The story in this theatrical release is a special episode that happened between these two seasons, wherein certain circumstances have led her to try being the Universe's top idol...
Well... Okay, yeah. One can only tolerate so many stories about galactic battles against moon-walking space robots...
Profile 4
Unparalleled Waltz: B
A Servant's incredible skill. This precise, spectacular performance goes beyond human physical ability and even perception!
Infinite Upstream Lyrics: C
A method of cracking by singing using magecraft rhymes that are effective against theoretical thinking, especially AI and machines.
King's Singing Voice: C
A blessed singing voice that heals people and works miracles, commonly called "Royal Touch."
Profile 5
『Lumino Calibur』
Rank: B
NP Type: Anti-Personnel
Range: 5 - 55
Maximum Targets: 14471
Dominating Sword of Dazzling, Illusionary Song.
It is the forbidden guitar blade "Evil Lumino Calibur Strings," said to be playable only by those who formed a contract with the demon of music (it was actually on clearance at Planet Chamizu). The honed Idol☆Glo Points that trigger super feels change the battlefield into a stage with glittering, flashing lights.
The great moonlit river...so luminous! Be it the divine voice from the underworld...it will still be harmonious! Hear the song of my sword! Lumino Calibur!!!
Additional profile
Even though her aloof demeanor and tone of voice haven't changed much from her villainous Berserker form, she has loosened up a bit. She even smiles now, and sometimes actually makes jokes. Her desire to please and entertain others has surfaced, but she also allows her weakness and frustrations to show. She was surprised to learn that she had many emotions, which were simply in the way when she was just wielding her sword, and has come to realize that these feelings could be applied to writing music and lyrics. She is starting to realize that, instead of relying on terror and violence as she did in her villain days, maybe she should be more honest about her own feelings if it means she could move people through song and music...
Stats
- HP184th of 41912,375
- ATK277th of 4199,045
- Star generation55th of 41915%
- Star absorption51st of 419153
- Death rate27th of 4196.7%
- NP gain per hit66th of 4190.9%
- NP gain when hit3%
At level 80. 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 80 is the natural cap for a 4-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
- 3 (16/33/51%)
- Extra hits
- 5 (6/13/20/26/35%)
- Quick hits
- 4 (10/20/30/40%)
- Buster hits
- 4 (10/20/30/40%)
- Star generation
- 15%
- Star absorption
- 153
- Death rate
- 6.7%
- Party cost
- 12
- NP gain per hit (Arts / Quick / Buster / Extra)
- 0.9% / 0.9% / 0.9% / 0.9%
- NP gain when hit
- 3%
Skills
3
Unparalleled Waltz B
Skill 1LevelIncrease Quick Card effectiveness (3 times, 3 turns) & Buster Card effectiveness (3 times, 3 turns) & apply Evade (1 time, 3 turns) for yourself
- Quick Up (self, 3 turns, 3 times)
- 30%
- Buster Up (self, 3 turns, 3 times)
- 30%
- Cooldown
- 5 turns

Infinite Upstream Lyrics C
Skill 2LevelIncrease Critical Strength (1 turn) & apply Special Attack [Machine] (3 turns) for yourself
- Critical Up (self, 1 turn)
- 100%
- STR Up vs. Machine (self, 3 turns)
- 50%
- Cooldown
- 4 turns

King's Singing Voice C
Skill 3LevelIncrease ATK (3 turns) & restore HP for all allies
- ATK Up (all allies, 3 turns)
- 20%
- gainHp (all allies)
- 2000
- Cooldown
- 5 turns
Noble Phantasm
Lumino Calibur
Rank B · Anti-Personnel · 4 hitsIncrease Quick Card effectiveness (1 turn) <effect increases with Overcharge> for yourself + Deal heavy Special Attack damage to all [Evil] enemies
- Quick Up (self, 1 turn, by Overcharge)
- 20%
- Damage (extra against the target trait) (all enemies)
- 1000%
Class and append skills
Gain 2 C. Stars each turn & increase Debuff Resist for yourself
- C. Star Gain Per Turn
- 2
- Debuff Resist Up
- 4%
Slightly increase your Buster Card effectiveness
- Buster Up
- 6%
Increase your Debuff Resist
- Debuff Resist Up
- 17.5%
Increase Extra Attack Card's effectiveness by 50% for yourself
Begin battle with NP charged at 20% for yourself
Increase ATK against [Berserker] 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
4
Ascension 1
Ascension 2
Ascension 3
Ascension 4
Materials
Ascension
- Ascension 1Materials:
Cosmo Guitar x1QP: 50,000 QP - Ascension 2Materials:
Cosmo Guitar x1QP: 150,000 QP - Ascension 3Materials:
Cosmo Guitar x1QP: 500,000 QP - Ascension 4Materials:
Cosmo Guitar x1QP: 1,500,000 QP
2,200,000 QP for all four ascensions.
Skill enhancement (one skill)
- Level 1 to 2Materials:
Dragon Fang x8QP: 100,000 QP - Level 2 to 3Materials:
Meteor Horseshoe x8QP: 200,000 QP - Level 3 to 4Materials:
Eternal Gear x10QP: 600,000 QP - Level 4 to 5Materials:
Warhorse's Young Horn x10QP: 800,000 QP - Level 5 to 6Materials:
Aurora Steel x10QP: 2,000,000 QP - Level 6 to 7Materials:
Divine Leyline Spiritron x12QP: 2,500,000 QP - Level 7 to 8Materials:
Reactor Core of Dawn x12QP: 5,000,000 QP - Level 8 to 9Materials:
Fragment of a Twinkling Star x12QP: 6,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 10,000,000 QP
27,200,000 QP to take one skill from 1 to 10, 81,600,000 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:
Forbidden Page x8QP: 100,000 QP - Level 2 to 3Materials:
Phoenix Feather x8QP: 200,000 QP - Level 3 to 4Materials:
Lamp of Evil-Sealing x10QP: 600,000 QP - Level 4 to 5Materials:
Primordial Lanugo x10QP: 800,000 QP - Level 5 to 6Materials:
Tsukumo Mirror x10QP: 2,000,000 QP - Level 6 to 7Materials:
Crown of Silvery Light x12QP: 2,500,000 QP - Level 7 to 8Materials:
Fruit of Eternity x12QP: 5,000,000 QP - Level 8 to 9Materials:
Ball of Rainbow Thread x12QP: 6,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 10,000,000 QP
Palingenesis (Holy Grails)
- 1Level cap: 85QP: 5,000,000 QP
- 2Level cap: 90QP: 6,000,000 QP
- 3Level cap: 92QP: 7,000,000 QP
- 4Level cap: 94QP: 8,000,000 QP
- 5Level cap: 96QP: 9,000,000 QP
- 6Level cap: 98QP: 10,000,000 QP
- 7Level cap: 100QP: 12,000,000 QP
- 8Level cap: 102QP: 12,000,000 QP
- 9Level cap: 104QP: 12,000,000 QP
- 10Level cap: 106QP: 12,000,000 QP
- 11Level cap: 108QP: 12,000,000 QP
- 12Level cap: 110QP: 12,000,000 QP
- 13Level cap: 112QP: 12,000,000 QP
- 14Level cap: 114QP: 12,000,000 QP
- 15Level cap: 116QP: 12,000,000 QP
- 16Level cap: 118QP: 12,000,000 QP
- 17Level cap: 120QP: 0 QP
Each summon of this servant gives 0 Servant Coins.
Bond
- 3,750Bond 2: 6,750Bond 3: 10,500Bond 4: 15,000Bond 5: 240,000Bond 6: 500,000Bond 7: 770,000Bond 8: 1,070,000Bond 9: 1,465,000Bond 10: 2,555,000
Total bond points to reach each level.

Apply 15% Special Attack [Machine] & apply 15% Special Attack [Evil] to all allies only if [servantName 2500800] (Foreigner) is equipped with this Craft Essence when she is on the field
Voice lines
71Home (18)
- Bond Level 1
- This [Floating Pod] is Little Black Knight's enclosure unit. It comes in quite handy, but that depressing feeling comes at you in doubles and doubles, like surround sound. Loudness...
- Bond Level 2
- Oh it's you, Master. Ah, this isn't reading material. I'm composing. I was thinking of song lyrics. I was thinking of how great my "beats" would be with some added "sweets", but... If only I could put out one more phrase... What do you think, mage...have any idea to write something on my page...? (Gasp!)
- Bond Level 3
- (Munch, munch) "Wow, this kintsuba confection is exquisite." Oh, I was just practicing for a food commercial that's inevitably going to come for me. You may be surprised, but I do believe I'm a shoo-in for it. I hope you'll go find some sort of sweets company sponsorship for me...
- Bond Level 4
- Wait, hmmm...I think I was tasked with some sort of special mission. Yeah...something big, almost on a universe-scale... Do you think it's appropriate for me to be just doing idol things like this? Huh? You're saying that the path to becoming an idol is no cakewalk either? Ah, I guess you're right. That's what I wanted to hear from my Master...I mean, MasP!
- Bond Level 5
- Hey Master. Did I become one of your favorites? I would be happy to know I became the kind of idol that would provide a little change of scenery for your everyday life, as well as making you look forward to tomorrow. Hehe.
- Conversation 1
- Then let's head out. As long as you're with me, Master, anywhere can be a concert stage.
- Conversation 2
- Singing, dancing, and performing take a lot out of me. Providing me with Japanese confections is the best and most efficient way to replenish my energy. That's right, this is a very rational strategy... It is indeed!
- Conversation 3
- I want to be your one and only...idol that you stan... W-w-w-waaah! Look! I just got goosebumps from saying that! See, even here! You're asking me why I said such a thing!? I DON'T KNOW!!!
- Likes
- Opening up a book while I nibble on some Japanese confections... I feel a little guilty for doing it, and it was perhaps a way for me to escape. At least that's how I reflect on it, now that I've stepped onto the stage and become an idol and opened up my heart to the people. Huh? You want to know what I like? Reading and Japanese confections. But what of it?
- Dislikes
- M-Master? Um...could you...well...I have a favor to ask you. I really don't like...I just can't stand those things. Yes, those things! Those metal parts that hold my stockings together! Whenever I touch them, the back of my teeth get all tingly and make me want to go "ieee!" Ugh, it makes my skin crawl just thinking about them!
- About the Holy Grail
- The Holy Grail? I've been thinking about it for a while, but maybe you could chill it really cold and serve black bean anmitsu with it or something! Don't forget to add those sour apricots too! Ah...I want a Holy Grail...
- Conversation 4
- Oh, Miss X...? Nobody but her can be so annoying and cause trouble whenever they're around. I'm surprised you tolerate her, Master. If you have any tips, please share. In detail! The whole truth!
- Conversation 5
- Mysterious Heroine...XX!? Whoa... The chronology of the Universe is all out of wack! Perhaps it's best I don't get near her... But then again, she's easier to talk to than that OTHER one. Coincidently, we're fellow Forei...I mean, Sabers. Hmmmmmm???
- Conversation 6
- Elisabeth is Earth's idol, isn't she? At a brief glance, she seems to be juggling three regular programs simultaneously, and she seems to all be herself. She's pretty tough. I aspire to be like her, as both an idol and Servant. But then again, does she kind of resemble the Venus Beast that was said to destroy an entire Venusian civilization in one night?
- Conversation 7
- The CEO of Amazones is godlike. Almighty. But the person who delivers my subscription of Japanese confections from Starburst looks more emaciated every day... Do you think they're okay? Do you think ordering morning, afternoon, and late-night deliveries is too much...?
- Conversation 8
- The demon of music, AmadaciasP! Letting such a terrifying and threatening person loose in Chaldea is a terrible idea. Hm? Different Servant? Come on...you can't fool me!
- During an Event
- This feeling of hot passion, this excited stir... Could there be a festival going on!? I sense a bunch of delicious food stands around!
- Birthday
- To be honest, I don't like birthdays. I'm sorry to tell you this, even though it should be a special day. Haha, it's funny that I'm the one getting cheered up. Phew. May your upcoming days be guided by Alternium.
Growth (7)
- Level up 1
- May your thoughts turn into power for me.
- Level up 2
- Yum, yum, yum... [id 2500800_0_G111]Oh hand me some tea too, please.
- Level up 3
- Encore, encore.
- Ascension 1
- Oh, this is like some sort of commemorative day. [id 2500800_0_G031]I'll take this opportunity to play you a song. [id 2500800_0_G032]You gave me materials♪ [id 2500800_0_G033]With a look that said maybe they were wasted♪
- Ascension 2
- Mysterious Heroine Alter XX? [id 2500800_0_G021]There's someone like that...? [id 2500800_0_G022]There isn't...?
- Ascension 3
- Thank you. I'm happy. [id 2500800_0_G041]Do you think I'll be able to catch up to you-know-who someday...?
- Ascension 4
- Master, have you ever loved someone? [id 2500800_0_G051]A whole day suddenly feels like an instant...[id 2500800_0_G052]but the next thing you know a single second feels like an eternity. [id 2500800_0_G053]And there are nights where you are in agony and you can't sleep. [id 2500800_0_G054]But as long as there is music, it makes things surprisingly easier. [id 2500800_0_G055]Hehe...I may be a Servant, but I feel like I'm alive.
First summon (1)
- Summon
- Mysterious Idol X Alter... My class is Fore...I mean, Saber. Actually, I'm an idol. I'm going to release the Altereactor on the entire Universe, and setting the Idol☆Glo at full force to propel myself to max popularity! If you like, just call me Ex.
Battle (1)
- Temporary
- Yay, that's right! I am the Mysterious Idol X Alter. I am Ex, an idol from Chaldea Productions. It's nice to make your acquaintance, Master...I mean, MasP. I'll give my all singing, later getting into the groove, and sometimes I'll half-heartedly sing, so keep a watchful eye on me, okay!?
Treasure Device (7)
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 1
- I'm going to do my best to become the best and strongest idol in all the Singularities. Yeah!
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 2
- Good morning! Master, now dubbed MasP...take good care of me!
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 3
- Fmmm, hmmmfmmmmhmmm... Ah, you're here to check on your Point Rewards. I've been waiting for you.
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 4
- What's today's snack? Dumplings, red bean soup, manjyu... Ex-Stream!☆
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 5
- You'll learn a lot from reading the announcements. Everything, even about space. How to proceed through the event...today's Pickup...even why the combination of red bean paste with mochi is infinitely great...
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 6
- Miss Crane... She was an amusing person. She was cute and a wonderful person. I hope I can meet her somewhere in space again someday. ...Actually, I have a feeling I'll see her again real soon.
- Bedazzled! Grail Concert! Crane Returns an Idol's Favor 7
- Ex-Stream!☆ How was it? It ending up being a Servant song event was a surprise, wasn't it? Well, I've been saying I wanted something like this to happen for the longest time, so I guess sometimes nagging helps. And I was super happy when MasP was cheering me on so passionately... I look forward to doing this again in the future. You've been watching an episode of Ex-Stream!
Event (35)
- Battle Start 1
- The concert where fierce battles ensue starts here!
- Battle Start 2
- Leap and dance, my heart.
- Battle Start 3
- Front and center, people, let's gooo!
- Battle Start 4
- This is my last song. Ehhh...
- Skill 1
- The future's pitch dark matter♪
- Skill 2
- This is the way of the Alter♪
- Skill 3
- Is everyone excited!?
- Skill 4
- Eating is part of work... (Munch, munch)
- Command Card 1
- That's what you choose?
- Command Card 2
- It's delicious.
- Command Card 3
- Are these gifts?
- Noble Phantasm Card 1
- This is the song you've all been waiting for.
- Noble Phantasm Card 2
- There's a confection I want to eat♪
- Attack 1
- Thanks, audience!
- Attack 2
- Glow, embracing the star's light♪
- Attack 3
- Sei! Yah! We're getting heated!
- Attack 4
- Ah, one, two, san, four!
- Attack 5
- Beams are the life of an idol!
- Attack 6
- Hah! So sweet!
- Attack 7
- Come on! Sing!
- Extra Attack 1
- Time to introduce our members! Actually, it's just me!
- Extra Attack 2
- Introducing another member! The straight man, Mini Black Knight!
- Extra Attack 3
- You say Ex!
- Damage 1
- That was an impressive battle of the bands.
- Damage 2
- Hyah...
- Damage 3
- You got me...
- Damage 4
- Ouch.
- Incapacitated 1
- I want to sing that song...once more...
- Incapacitated 2
- I can still...sing...
- Incapacitated 3
- Everyone's...alone...
- Incapacitated 4
- Lalala, la...lala, la...
- Victory 1
- Did I perform well?
- Victory 2
- I'd rather have some anko mochi than an encore!
- Victory 3
- Okay, good work!
- Victory 4
- That was a good jam session.
My Room (2)
- Noble Phantasm 1
- The great moonlit river...so luminous! [id 2500800_0_B051]Be it the divine voice from the underworld...it will still be harmonious! [id 2500800_0_B052]Hear the song of my sword! [id 2500800_0_B053]Lumino Calibur!!!
- Noble Phantasm 2
- The ballad of the silent Alter... [id 2500800_0_B801]At the end of the journey, you will laugh, while I learn to cry. [id 2500800_0_B802]All is in the blink of the stars in the heavens. [id 2500800_0_B803]Lumino Calibur.
Voiced by Ayako Kawasumi. Illustrated by BUNBUN.
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