BBSlotWinner This is an event Servant Gift Icon. It can only be obtained by participating in a time-limited event. This Servant cannot be summoned.
Servant Dialogue

This article is about 4 ★ Mooncancer B B. For 5 ★ Mooncancer, see B B (Summer).



★ ★ ★ ★

Japanese Name: BB
AKA: Mysterious Black Magus
ID: 166 Cost: 12
ATK: 1,366/8,197 HP: 2,182/13,643
Grail ATK: 9,925 Grail HP: 16,542
Voice Actor: Shitaya Noriko Illustrator: Wada Arco
Attribute: Man Growth Curve: Linear
Star Absorption: 52 Star Generation: 14.7%
NP Charge ATK: 0.61% NP Charge DEF: 3%
Death Rate: 0.6% Alignments: Chaotic・Good
Gender: Female
Traits: Female, Humanoid, Servant, Weak to Enuma Elish
Quickicon4  |  Artsicon3  |  Bustericon1  |  Extraicon4

Active Skills Passive Skills Noble Phantasm Ascension Skill Upgrade Bond Level Biography Availability Trivia

Active Skills

Available from the start
Ten Crowns D
Removes one ally's debuffs.
Recovers their HP.
Debuffimmune Grants them Debuff Immunity for 1 time, 3 turns.
Level 12345678910
HealEffect Heal + 1000120014001600180020002200240026003000
Cooldown 6 54

Unlocks after 1st Ascension
Aurea Boura: Golden Grail C
Removes one enemy's Evasion and Invincibility buffs.
Chance to Stun them for 1 turn.
Level 12345678910
Stunstatus Stun Chance + 50%55%60%65%70%75%80%85%90%100%
Cooldown 8 76

Unlocks after 3rd Ascension
Self-Modification EX
Increases own critical damage for 3 turns.
Increases own critical star absorption for 3 turns.
Level 12345678910
Critdmgup Crit Damage + 20%23%26%29%32%35%38%41%44%50%
Critabsup Absorption + 400%440%480%520%560%600%640%680%720%800%
Cooldown 7 65

Passive Skills

Anti magic
Magic Resistance B
Increases own debuff resistance by 17.5%.
Item construction
Item Construction A
Increases own debuff success rate by 10%.
Territory creation
Territory Creation A
Increases own Arts performance by 10%.

Noble Phantasm

Cursed Cupid Cleanser
Rank Classification Type Hit-Count
A Anti-Unit Arts 5
Effect Deals damage to one enemy.
NpCharge Charges party's NP gauge by 20%.
NP Level 1 2 3 4 5
Powerup Damage + 900% 1200% 1350% 1425% 1500%
Overcharge Effect Reduces their debuff resistance for 3 turns.
Charge 100% 200% 300% 400% 500%
Resistancedown Debuff Res - 10% 20% 30% 40% 50%

Grand Order】BB Noble Phantasm【FGO】ビィビィ・宝具【FateGO】

Grand Order】BB Noble Phantasm【FGO】ビィビィ・宝具【FateGO】


Item 1 Item 2 Item 3 Item 4 QP
1st BBRibbonItem21 Qp50,000
2nd BBRibbonItem21 Qp150,000
3rd BBRibbonItem21 Qp500,000
4th BBRibbonItem21 Qp1,500,000

Skill Reinforcement

Item 1 Item 2 Item 3 Item 4 QP
1st Shiningcaster4 Shiningrider4 Qp100,000
2nd Shiningcaster10 Shiningrider10 Qp200,000
3rd Magiccaster4 Magicrider4 Qp600,000
4th Magiccaster10 Magicrider10 Qp800,000
5th Secretcaster4 Secretrider4 Qp2,000,000
6th Secretcaster10 Secretrider10 Qp2,500,000
7th Primordial Lanugo4 Lamp of Demon Sealing4 Qp5,000,000
8th Spiritroot7 Scarab of Wisdom7 Qp6,000,000
9th Crystallized lore1 Qp10,000,000


Strength: E
Endurance: C
Agility: D
Mana: A
Luck: EX

Bond Level

Bond Level 1 BoundLevel1 2 BoundLevel2 3 BoundLevel3 4 BoundLevel4 5 BoundLevel5 6 BoundLevel6 7 BoundLevel7 8 BoundLevel8 9 BoundLevel9 10 BoundLevel10
Bond Required 3,000 6,125 6,125 6,125 6,125 262,500 290,000 300,500 309,500 315,000
Total Bond 3,000 9,125 15,250 21,375 27,500 290,000 580,000 880,500 1,190,000 1,505,000
Bond 10 Reward BBbond10Icon A Passerby's Dream
When equipped on B B,
Increases party's Buster, Arts and Quick performance by 8% while she is on the field.


Unlock Description Translation
Default かつてムーンセル・オートマトンに発生した特殊事例。




A special case that occurred in the Moon Cell Automaton.

Originally an Advanced AI tasked with managing the health of masters, she went berserk due to a bug.
As a cancer that invades the digital world, she seized control of the Far side of the Moon. A digital devil that interfered with SE.RA.PH's Holy Grail War.
She makes the Holy Grail War participants abide by rules, but she herself is a personification of rule breaking and illegal modifications.
While she could destroy the world on a whim, she is an underclassman type devil heroine who places all her effort in showing off to her senpai (master) as an energetic, precocious underclassman.

"Something like a well-mannered fight is boring isn't it?
I'd like to see more of everyone's suffering faces!"

From such a showy display, it's evident that her behavior and personality settings are twisted but, well, its the usual BB-chan.

Bond 1 身長/体重:156cm・46kg

出典:『Fate/EXTRA CCC』
属性:混沌・善 性別:女性

Height / Weight: 156 cm・46kg

Region: SE.RA.PH
Alignment: Chaotic・Good
Gender: Female
"Actually being a Ruler would have been great but I called it off. A structure that has the Gamemaster also bound to the rules, something like that would just be like a machine.
For the sake of love, BB-chan has no choice but to torment everyone in humanity!"

Bond 2 言動は邪悪でイケイケ、台詞や言動が滑ってもそのまま突き進む猪突猛進な黒幕ガール。




A malicious, high-spirited manner of speaking, and even if she flubs her lines or speech, she is a scheming girl who will recklessly push forward.

Though by nature she has a reserved, introverted character, she is a character that will earnestly become more active for the sake of her loved one.
She enjoys acting out the villainous role but, having no grounding causes her fail regardless.
Her confidence is inherently derived from her sadistic preferences. Her little devil characteristic surfaces here. Adding on, as an enduring and enduring, only to finally explode type, she displays an incredible S-disposition.
As she is acting out the villain, "This is ex-tremely fun!" is the kind of high she gets into, but getting depressed when her mind is collected backstage is also one set.

Although she produced the Alter Egos to assist in her work as lower grade familiars, she has a poor relationship with them. That should be the case, as the Alter Egos are not "BB's personality copies", but "created from the base of her personality", which is why they have differing opinions from their parent BB.
Meltlilith and Passionlip are not avatars but alter egos (Different personality), which is why they are titled such.

Bond 3 『C.C.C.』

ランク:A 種別:対人宝具 レンジ:1~10
「あれ、もうさんざん使ったので飽きました。今回のテーマはキュート&キュアライズ! あ、でも皆さんの味方になったからってカースドな部分は消えませんから。BBちゃんの呪いは永遠なのです!」



Rank: A
Type: Anti-Unit
Range: 1~10
Maximum Targets: 1
Cursed Cupid Cleanser.
Formerly it was the Spirit Particle Imaginary Pit (Cursed Cutting Crater) which BB held as her Noble Phantasm but,
"I've used that so much that I've gotten bored of it. This time's theme is Cute & Cure-lize! Oh, but even though I'm on your side, the Cursed part won't entirely be removed. BB-chan's curse is eternal!"
and with a triumphant look she presents this new skill.

It draws out the power of the Moon Cell, and she transforms into an invincible nurse. From her territory of imaginary space she brings out malicious information and rewrites the surrounding channel (shared perception) into chaos.
The reality marble "BB Channel branch-off edition" expands, and throws the target into a crucible of chaos...though there's a lot going on but in short its an injection attack from BB after she changes into a nurse.

Bond 4 十の王冠:EX→D

今回のキレイで可愛いBBちゃんには必要のないスキルなのでした☆ あ、でも少しぐらいなら使ってもOKですよ? ほーらこんな風に!


Ten Crowns: EX -> D

A distinguished authority class skill.
It is said that the ten crowns indicate the ten evil kings, and the seven hills indicate the abdominable city of evil. On a simple look, it is a skill that turns received injuries and occurred events, all kinds of results into as if 'nothing happened'. As a matter of fact, BB is invincible as long as she has this skill.
As if, such a thing is a story of the past.
I mean, looking at it from the side, having an invincible cheat makes me look pathetic right?
This time's pretty and cute BB-chan has no need for this skill☆
Oh, but using just a little bit should be OK right? Just like this!

Self-Modification: EX
A skill to modify oneself.
AIs of the Moon Cell are equipped with an absolute order to "not improve their functions. However, BB escaped from this yoke due to a break-down, and began to expand her own functions.
In order to expand her calculation abilities, she predated and decomposed NPCs, AIs, and even servants through black noise to employ in her own memory.
A posterior add-on that is not weary of self-breakdown, but as a result, BB became a hyper grade AI possessing an enormous capacity. These circumstances are are like a city of reclaimed land that continues construction despite sinking into water, or even the monster of Frankenstein.

Bond 5 かつてケース・CCCを起こした暴走AI。



The berserk AI who caused the case CCC in the past.

She was the AI in charge of the infirmary, but due to a bug, her self-preservation's command system went into a rampage.
For a certain reason, she concluded that "no matter what the sacrifice, her self-preservation must continue", and took in NPCs, Servants, and Masters, becoming a continuously growing monster.
She declares that she hates humans, and captured a certain master to the Far Side of the Moon, tormenting them.
She tries to give off a sense of normalcy, but from an objective standpoint, she is clearly insane.
From all of her speech, there is a drifting paradox of excessive love and clouded love-hate but, whatever the cause was can be referred to in CCC's story.
In addition, her Luck parameter was of the lowest rank E-, but through BB's world distorting level of effort (and dedication), it became EX rank. In short, "Luck EX" is the unquantifiable, unachievable "miracle" that she once attained.

Extra FGO世界のキアラがCCC世界のキアラと同一化した事で、ムーンセルはその対抗策としてBBを一時的にサーヴァント化し、FGO世界に派遣した。


「だから、わたしを好きになっても無駄ですよ? どんなにアナタがBBちゃんにメロメロになっても、わたしは決して捕まりませんから(ハート)」

Due to the Kiara of the FGO world merging with the Kiara of the CCC world, the Moon Cell temporarily converted BB into a servant as a countermeasure, and dispatched her into the FGO world.

(BB was the most suitable person to control Kiara as the user of Imaginary Space.)
Thus "The reappearance of the bug called BB" was present but, BB became able to intervene with Seraphix as an independent digital entity.
The BB that appeared in the FGO world behaved as the little devil from the "CCC Incident", but to her, the incident felt like something extremely distant in the past.
In addition, she can only exist as a servant in the FGO world, as she grasped that BB does not exist in the original "CCC World". BB understood that she was an illusion of a single night.

BB does not label herself as "a tool to save humanity", but as a "devil that bothers humanity, and sometimes helps it".
"That's why, coming to like me is useless you know? No matter how lovey-dovey you become for BB, I'll never be caught ♥"
she says while looking triumphant.

April Fool AIサーヴァント


AI-type Servant

A mysterous kouhai who came from the sexy Cyber World.
However, unlike Mash who is a covert-type, BB is the little devil who loves to bully her Senpai
without any form of politeness, and none of her colleagues are exempted from this either.


  • BB was an Event Reward from SE.RA.PH Event.
  • She shares the exact ATK values at minimum with Alexander.