Alternate versions

BB (ビィビィ, Byibyi?) is an Advanced AI originating from the Advanced AI Sakura Matou in Fate/EXTRA CCC. She is the creator and Master of the Sakura Five in the Sakura Labyrinth. She is also a MoonCancer-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.



BB is a backup AI created by Sakura containing her feelings for Hakuno Kishinami. During the preliminaries, she, who had her freedom unleashed by the hands of Kiara Sessyoin, could not control that abnormal status and caused an overload. Because the NPCs cannot do anything but routine work, they ignored Sakura who began to disintegrate as something "nonexistent" and since the Moon Cell's check was performed only at the end of the day during the preliminaries, Sakura was in a crisis of being extinguished. Upon laying his/her eyes on such abnormality, Hakuno called out for her saying "Are you all right?" By receiving the observation from another that "I'm right here", Sakura recovered her unconsciousness that was on the verge of being extinguished and acquired a clear ego of "I want to be here" due to the subsequent nursing. She escaped from the extinguishing of her ego.

Once the next day came, everything would be deleted by the hand of the Moon Cell. Sakura wished to continue this miracle of a mere day and employed the privilege of a high grade AI and repeated the "single day when I got to know Hakuno" for 69 days. However, as the day advanced Sakura began to suffer with her self-contradictions as an AI and the reality surrounding Hakuno.

« For the Masters that participate in the Holy Grail War, all will die with the exception of one. No, to begin with Hakuno Kishinami is... »

(Sakura Matou)

Sakura kept suffering from the selfishness of eternally looping those happy times and her feelings towards Hakuno. In conclusion, she chose the path of sealing away the 69 days worth of memory. She sealed the memory of "love" that she acquired in order to turn back into a normal AI. AIs cannot delete records, so she reset herself by moving the memory to a backup unit, believing that this would be the most correct choice for Hakuno. However, even after losing the memories of the mind, the reminiscences recorded in the body survived. She was supposed to have forgotten everything and turned back into a normal AI but she started to be shaken up by an unidentified emotion-value whenever speaking with Hakuno. On the other hand, the backup where the memories were moved to one day decided her own plans as BB. With her 69 days memories of love, BB became the rebel that disrupts the system of the Moon Cell for the sake of a certain objective, "to save Hakuno from their inescapable end upon the conclusion of the Holy Grail War", and began to take action.

In real time, the timing when she seized the Far Side of the Moon was "the end of the fifth round prior to the start of the sixth round of the Holy Grail War". The four who had not been defeated yet were Hakuno, Leonardo B. Harwey, Rin Tohsaka, Rani VIII and the irregular Jinako Carigiri. They were midway through the Holy Grail War until they were kidnapped to the Far Side of the Moon while still alive. Masters that were defeated in the Holy Grail War such as Shinji Matou, Monji Gatou and Julius B. Harwey were moved to the imaginary space "0.00001 seconds before" being annihilated by the Firewall, extending their momentary lives.

At any rate, C.C.C. is a dream seen by BB. If the one seeing the dream disappears, the world should return to the prior reality where nothing happened. Also, this is a digression, but the ordinary scenery that Hakuno saw as a nightmare in the beginning was an artificial paradise built with those abandoned 69 days as a model. After BB dragged Hakuno to the Far Side of the Moon, she enshrined Hakuno in the electronic brain of the old school building, imprisoned into a deep sleep and a dream that Hakuno could not wake up from. Normally Hakuno would spend time peacefully in that looping everyday, but due to the strong link with Hakuno's Servants or maybe Hakuno's will to reject the peaceful repetitive days, tears arose on the artificial paradise and Hakuno became aware of the abnormality.

BB attempted to reset the school building and start over the dream in order to once again throw Hakuno into a deep sleep, but Hakuno also ended up escaping from that reset and jumping into the further depths of the imaginary space. That was the bottom beyond even the bottom of the id. The "collective unconsciousness" beneath the unconscious. What saved Hakuno, who ended up jumping into a territory that even BB could not reach out, was the voice of the Servant who shared fate with them. Thus the contract was exchanged and Hakuno woke up in the old school building that was left in the Far Side of the Moon.

BB had created the Sakura Labyrinth (サクラ迷宮, Sakura Meikyū?), and later the Alter Egos known as the Sakura Five. All five Alter Egos resemble her and Sakura. She had killed off Run Ru and taken Lancer as her servant.


BB bears a resemblance to Sakura Matou with her long purple hair that reaches her ankle and purple eyes, which when she is under the control of Moon Cell, turn red. BB wears long black coat with a matching mini skirt that exposes her white panties and wears a white shirt(depicted as leotard in concept art) that empathizes her large breasts and a red bowtie. She also wears white gloves, black floral-patterned thigh high stockings, and low-heeled shoes. Like Sakura, BB has a red ribbon tied to her hair on the left side of her head. BB is also shown to wield a teacher pointer as a weapon. In Fate/Grand Order, her stockings were changed to a simpler design with a slit in the middle while she also gains a blue Moon Cell emblem on her coat's left sleeve.


While she gives off an evil inclination, she is described as "not as bad a person as she seems." She was developed to be different than Dark Sakura, more like an "impish underclassman."[5] Comparatively, while Dark Sakura is driven by hatred and vengeance, BB is driven by her love and wish to protect Hakuno Kishinami due to them showing her kindness while she was still White Sakura, from the deletion of Moon Cell, even though she herself has to go against contradictions and impossibilities. She notes that she doesn't mind being called "BehBeh" or "BayBay" because girls like her who talk with their hearts are like that.

She claims she doesn't have a weakness. Her fetishes are Eyes.[3]

While BB and her Alter Egos normally only pay attention to Hakuno, Meltryllis instead goes after Archer if he is paired with the female Hakuno. If there were a girl BB and Sakura were based on, she likely would have longed after someone like him/her.[3][6]



  • BB's Secret Garden
  • BB's punishment

She resides in Tsukimihara Academy’s infirmary, and she is shown introducing herself to Sakura.

She created both Meltryllis and Passionlip.

BB first appears after Hakuno defeats Rin Tohsaka. Hakuno also learns that Kotomine Kirei was forced to become a store clerk by BB. Periodically, BB forces the student council to hear announcements through BB Channel while paralyzed and only Hakuno can respond to.

BB has employed both Lancer Elizabeth and Archer Robin Hood as her personal Servants. She is also responsible for Rin, Rani, and Jinako (with the help of Julius) becoming Sentinels. While cheery at first, BB becomes increasingly less human-like as the game progresses. She is especially hostile toward Gilgamesh and wishes Hakuno would sever her contract with him.

After defeating Jinako, Leo and Gawain confront BB but suffer defeat. BB promptly tried to banish Hakuno, their allies and their Servant to prevent them from escaping the Far Side of the Moon, but Julius's betrayal, coupled with Hakuno's unwavering determination, enabled the student council to reform and continue trying to counter BB's actions.

In the normal route, BB is the final boss that must be defeated. In the CCC True Route, however, the final boss is Kiara Sessyoin. In addition, BB's SG can only be fully acquired through the True Route.

Fate/EXTRA CCC Fox TailEdit

Differing from Fate/EXTRA CCC, Kazuradrop, Kingprotea, and Violet are active. Before BB can begin to enact her plans, Kazuradrop manages to drain BB of 7/8ths of her power with her Insect Eater skill. Kazuradrop gives herself 2/8th of BB's power and creates another BB using the remaining 5/8ths. Having eaten Meltryllis and Kingprotea, Kazuradrop makes use of Meltryllis by placing the exterior of the newly created BB over her. She controls this BB while pretending to be Sakura in the school building.

The original BB attempts to subvert Kazuradrop's plans, directly intercepting the combined attack of Violet, Suzuka Gozen, and Karna, and giving Julius B. Harwey a copy of her wand.

Fate/Grand OrderEdit

Due to Kiara of the FGO world becoming one with the Kiara of the CCC world, as a countermeasure, the Mooncell temporarily turned BB into a Servant and dispatched her to the FGO world. Thus, despite being “a reproduction of the bug named BB”, she became able to intervene on the Seraphix as an independent virtual life-form. The BB that appeared in the FGO world behaves in a impish manner just like during the “CCC Incident”, but for her that incident feels like something from tens of thousands years in the past. In addition, she can only remain as a Servant like this in the FGO world and is also aware that she does not exist in the original “CCC world”. BB understand that she is a one-night-only dream. BB places herself not as “a tool to save humanity”, but as “a devil that at times misleads, at times helps humanity”.[1]

“So, it is futile to grow fond of me, you see? For even if you become madly in love with BB-chan, you’ll never be able to catch me (heart)”, or so she says with a triumphant look.[1]

SE.RA.PH. - Deep-Sea Cyber-Nirvana, Epic of Remnant: ExtraEdit

Serva★Fes 2018/Servant Fes 2020 : Servant Summer Festival!Edit

BB appears as the organizer of Servant Fes, merging the islands of Hawaii into the Singularity of Luluhawa. She greets Ritsuka and their friends upon their arrival at Honolulu and tasks them with retrieving the Holy Grail and bringing it to Kilauea in order to separate her from Pele whose Spirit Core she had consumed while setting up the festival in order to resolve the Singularity. As Medb will win Servant Fes' Holy Grail unless the group can create a better-selling manga than her, she sets up a time loop with which they can presumably improve their skills until they can outsell Medb.

The group had originally been summoned to Luluhawa to investigate the mysterious signature of a Foreigner class servant. Initially believing it to be Mysterious Heroine XX, they investigate further with the help of Edmond Dantes and discover that the Foreigner is actually BB, tracking her to Mauna Kea instead.

In reality, she had communed with an Outer God inferred to be Nyarlathotep and planned to trap the protagonists in an endless loop of suffering and pain by corrupting the wish they would make on the Holy Grail. With the help of MHXX, they dispel Nyarlathotep's influence over her.

Following her defeat, BB meets with the group at Honolulu International Airport and convinces them to defeat four extra "fragments" of herself - in the form of special raids - whose defeat will ensure Hawaii will return to normal.

Capsule ServantEdit

Capsule Servant - rin gsakura end

Rin and G-sakura ending.

BB appears as a Capsaba Servants.

In Rin's ending in G-Sakura route, Rin has taken over the MATO empire (時空帝国マト, Jikū Teikoku MATO?) and embarked on a quest for world domination as the dimensional empress Kaiser Rin. Rin has completed the GS Series. BB appears as the aerial humanoid weapon known as GS-03 BB SAKURA. She commented whether the sequel has coming out yet?


She is an Advanced Level AI (上級AI, Jōkyū AI?) entrusted with managing the health of the Masters, the same as Sakura. The methods she uses to "manage the Masters" have become extreme.[4]

When summoned as a Servant, her Luck parameter was supposed to be 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.[1]

Domina Coronam: Ten Crowns (十の王冠
, Jū no Ōkan
Domina Koronamu
?) is an EX rank skill. It has been said that the ten crowns indicates the ten evil kings and the seven hills indicate the abominable city of evil. It is unknown what kind of principle・authority it is, but that power's origin lies in a past that even the King of Heroes, who was supposed to be mankind's oldest, cannot reach. On a simple look, it is a Skill that turns received injuries and occurred events, that make all results as if "nothing happened". As a matter of fact, BB is invincible as long as she has this skill. The details of Ten Crowns is later revealed under a different name. BB compiled and absorbed many goddesses from the abyss of the Moon Cell, giving her Potnia Theron: Conception of All Animals (百獣母胎
, Hyakujū Botai
Potonia Terōn
?), the authority of the Earth Mother Goddess. None born of the earth can defy her authority as that would mean rebelling against the system of life itself. Her Noble Phantasm, Cursed Cutting Crater, is the maximum use of the skill.[4]

Self-Modification (自己改造, Jiko Kaizō?, localized as Metamorphosis) is the EX rank skill to remodel oneself. The AIs manufactured by the Moon Cell are furnished with an absolute order of "do not improve its functions". But BB, who escaped from this restriction due to a break-down, began to expand her own functions. In order to enhance her calculation abilities, she predated・decomposed through the black noises NPCs, AIs and even Servants on top of that and employed them as her own memory. A posterior add-on that is not weary of self-breakdown, but, as a result, BB changed into a hyper grade AI that possesses an enormous capacity. These circumstances are like a city of reclaimed land that continues to construct buildings even as it sinks into water, or even the monster of Frankenstein.[4]



Mooncancer form

During the events of Extra CCC, BB is not a Servant but she is classified as MoonCancer (ムーン・キャンサー, Mūn Kyansā?). She later takes it on as a Servant-class in Grand Order. She uses this form when she faces Hakuno and Hakuno's Servants.

Bishop's Staff of Rulership (支配の錫杖, Shihai no Shakujō?) is the teacher's pointer that BB carries. A device that allows her to use her authority as an advanced level AI to its fullest. There are restrictions from the far side of the moon, but with this, BB can revise the game rules (spirit particle laws within the SE.RA.PH). It is the Domina Coronam: Crowns of Ten Rulerships (十の支配の冠
, Jū no Shihai no Kanmuri
Domina Koronamu
?) worn by the Beast of Babylon converted into a teacher's cane. This is due to the theory that the seven-headed beast is male, which opposes the theory that it is female; its true nature is a phallus (an erect rod). The symbol of the king of the world who was granted power and authority by a great dragon and, during a period of 42 months, spat as many arrogant words as they desired and had received the right to desecrate all things. The beasts heads are the seven hills of the Roman Empire; Capitolium, Palatium, Aventinus, Esquilinus, Caelius, Quirinalis, Viminalis. In other words, it symbolized the Roman Empire itself, and those ten horns were symbols of Roman emperors; Augustus, Tiberius, Caligula, Claudius, Nero, Vespasianus, Titus, Galba, Otho, Vitellius.[4]
  • Domina Cronam Capitoline: Crowns of Ten Rulerships/Hill of One
  • Domina Cronam Caelius: Crowns of Ten Rulerships/Hill of Five
  • Domina Cronam Viminalis: Crowns of Ten Rulerships/Hill of Seven
  • Domina Coronam Capitoline: Crowns of Ten Rulerships/Hill of One (十の支配の冠/一の丘
    , Jū no Shihai no Kanmuri/Ichi no Oka
    Domina Koronamu Kapitoriumu
    ?) - A self apply skill that turns BB temporarily invincible.
  • Domina Coronam Caelius: Crowns of Ten Rulerships/Hill of Five (十の支配の冠/五の丘
    , Jū no Shihai no Kanmuri/Go no Oka
    Domina Koronamu Kaeriusu
    ?) - A self apply skill that increases her magic damage.
  • Domina Coronam Viminalis: Crowns of Ten Rulerships/Hill of Seven (十の支配の冠/七の丘
    , Jū no Shihai no Kanmuri/Shichi no Oka
    Domina Koronamu Wiminarisu
    ?) - Using her teacher pointer to create a Love shape beam which causes magic damage, she calls it "Sakura Beam!" (「さくらビーム!」, Sakura Bīmu?).
  • Golden Grail
  • Aurea Poculum
Aurea Poculum: Golden Grail (黄金の杯
, Ōgon no Hai
Aurea Pōkura
?) - The golden grail that BB possesses. The Holy Grail that grants its owner's impudent and selfish desires. The grail that the great enchantress who appears in The Revelation of St. John the Divine holds. Though it is a counterfeit Holy Grail, it is because that it is a counterfeit Holy Grail that it is become a "genuine" Holy Grail that grants the desires of humans without paying heed to right or wrong. To the Christians of those days, who considered honorable poverty a virtue, this grail, which was formed as a symbol of treasures such as gold, is no doubt the meaning of corrupt wealth, greed, and the vanity that leads one to adorn oneself. Though it is clear on the occasion that this grail is held by the great enchantress of Babylon which is the personification of the Roman Empire, this grail symbolizes the wealth of the earth, which is the inversion of Christ's words, "Do not pile up the wealth of the earth." [4] BB draws out the Golden Grail from within (visually shown by pulling it out of her cleavage) and pours the poison contents on the enemy, it vanishes the enemy's special stats and causes magic damage. When BB used this on Gawain, it caused "99999 damage". It assumes the form of a small mug in Fate/Grand Order.



BBB (ビィビィビィ, Byibyibyi?) is an "invincible anti-Servant robot of annihilation" created from old arenas of the Moon Cell Holy Grail War. She is an "unparalleled" mech-sized Labyrinth Robot guarding the third floor of the Sakura Labyrinth. In creating her, BB spent two minutes going to the Near Side, collected parts and pieces of old arenas, disassembled them into an enemy program, reset it, and then programmed her own "superior thought routines" with lots of surplus memory. BBB was programmed not to leave the third floor, but Passionlip used Trash & Crash to crush her and throw her into the arena.

BBB is described by Passionlip as "self-important and uncute", and it is said she is more honest about her feelings than BB.

Forms and Alternate VersionsEdit


Main article: MoonCancer (Fate/Grand Order - BB Pele)


  • BB concepts

BB was called the Mysterious Black Magus (黒衣の少女, Kokui no Shōjo?, Black-coat Girl). BBB was planned to appear in the third chapter, but was scrapped due to not being an interesting boss.

BB's name was chosen for TYPE-MOON's game development subsidiary, studio BB. In his statement for the studio reveal, Nasu expressed his full support for the development of more TYPE-MOON games, but expressed some puzzlement about the name of the studio.


  1. 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
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8

  3. 3.0 3.1 3.2 3.3 3.4 3.5
  4. 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13
  5. Fate/EXTRA CCC- "if there were a girl BB was based on, she probably would have longed after someone like [Archer]"

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