Caster (Fate/Crossover - Celica Ayatsuki Mercury)

**Caster** (キャスター, *Kyasutā*) is the servant of ??? in the ??? Holy Grail War.

*"It's not good to go all out, Minerva."* - Celica Ayatsuki Mercury

## Profile

### Identity

Caster's true identity is **Celica Ayatsuki Mercury**, sometimes known as the Sister, was the younger sister of Nine the Phantom. She was an excellent user of sorcery, being one of the few people in existence capable of exceptional healing sorcery. After surviving the Dark War, Celica became a nun and looked after Ragna the Bloodedge, Jin Kisaragi, and Saya before she was eventually slain by Yuuki Terumi. Kokonoe later materialized a copy of her soul from when she was a young woman.

Celica was one of the two daughters of Shuichiro Ayatsuki Mercury, another one being Konoe. She and her sister join a magic council where her sister became the 9th-ranked leader, while Celica is a specialized healer. They met Trinity Glassfield (who is the future part of Platinum the Trinity's halves), as well as the cat Beastkin siblings Jubei Mitsuyoshi and Tomonori, even an elderly werewolf Valkenhayn R. Hellsing.

On that fateful day, she met a time-displaced amnesiac warrior who referred himself Ragna the Bloodedge, who only remembered to came with a warning of the Black Beast coming to her timeline soon. Though Celica disbelieve at first, Black Beast's emergence became true, whereas Nine, Trinity, Valkenhayn and Jubei volunteer helping Ragna stopping the beast, with some help from Hakumen (a time-discplaced Jin Kisaragi from a same defunct timeline as time-displaced Ragna) who led the attack, but most four heroes like Hakumen and Valkenhayn felt uneasy with Nine using a slave spell on Yūki Terumi into becoming one of the known Six Heroes, which became proven to be true in sometimes after time-discplaced Ragna sacrifice his life destroying the beast.

After Terumi initiate his revenge on the Six Heroes, such as killing Tomonori, having Trinity lost her physical body, and even Nine caught off-guard and went insane for years upon being pushed to the boundary, yet Hakumen sacrifice his life to seal him and Terumi along with it, Celica and Jubei found three siblings, two boys who happens to be their timeline's Ragna and Jin, in addition of their sister Saya (later known as Noel Vermillion in the future).

For years, Celica became a nun at her church where she raised Ragna, Jin and Saya. However, Terumi discovered where she and the siblings are hiding, whereas Celica was killed by him, and Jin, who was given by a sickened Saya the Yukianessa was mind controlled by Terumi into cutting Ragna's right arm, leaving Ragna dying, while Saya was kidnapped by Terumi, yet somehow escaped sometimes later in a different way, whereas she (now renamed Noel) and Jin are raised by one of the Duodecim clan's family branches respectively, namely Vermillion and Kisaragi.

Celica's niece, Kokonoe, who was born between after Black Beast's defeat, and before Terumi's revenge on other five heroes started, has her DNA and conscious copied into Kushinada’s Lynchpin, creating an exact time-displaced duplicate version of original Celica, becoming a Chrono Phantasma to disable anything related to Azure nearby. However, a new Celica doesn't have the memories how her original-self died, and was warned by Kokonoe that her resurrection as a Chrono Phantasma is at limits. Kokonoe eventually created Minerva to both protect Celica and act as an amplifier for the latter's powers.

### Appearance

Celica is a young woman with medium-length brown hair she wears in a ponytail and red eyes. She wears a standard Mage's Guild uniform of a white shirt and black cape with gold trim, a red ribbon around her neck, a black and gold skirt, and brown steel-toed shoes.

### Personality

Sincerely kind to everyone who comes into her path, Celica struggles to find faults in anyone and does her best to appreciate the goodness in individuals. This outwardly trusting attitude has made others adorn her, but there have been times where Celica has landed herself in trouble because of her inability to sense the evil in others.

Family matters a great deal to Celica, and she loves both Nine and Shuichiro with all of her heart. Nine can be overly protective of Celica, leading to the latter developing a slight rebellious streak in order carry out her own will and defy Nine's orders. The two have had conflict in the past, particularly over Ragna and Shuichiro, but Celica will always sing her sister's praises. Celica's relationship with Shuichiro is more complicated - although she loves her father dearly, he does not reciprocate the feelings, having developed the Kushinada's Lynchpin which needed Celica's soul to activate. The one person who means the most to Celica, however, is Ragna. It is strongly implied that she harbors romantic feelings towards him and would do anything for his sake. This has lead to an interesting dynamic between the two.

Celica has a terrible sense of direction. To reach a destination by herself that only lays a few hundred meters away will take her hours; this trait is shared with her sister, Nine. It has been noted multiple times that Celica also holds maps upside-down. In her free time, Celica enjoys going for strolls, but given her sense of direction, these can take hours.

## Abilities

Celica has the rare ability to use healing Magic. She has been shown to heal most wounds, although she cannot use her magic to remove illnesses such as magic element poisoning. She has also exhibited the latent ability to suppress magic element, and it is for this reason that Celica is the key to Kushinada’s Lynchpin, a device created to seal the magic element within the Gate, and thus disrupt the source of the Black Beast’s power, although at the cost of her life. This also makes her the ultimate weakness of the Blue Grimoire as Ragna was unable to see through his right eye and move or use his grimoire as long as he was near her. Supposedly, this would also cause an immense detriment to Terumi as he began panicking at the sight of her. However, constant use of her magic element-suppression ability can have harmful effects on Celica, even to the point of shortening her life.

Her true power is control over the flow of life. The healing powers, displayed even before she learned magic, are a manifestation of it. At the time of the Great Dark War, very few people were able to use it, and even fewer at her level. She is also capable of accurately feeling and identifying the presence of others, as she is the one that confirms that Phantom is Nine. Hakumen compares it to an intuition sharper than any logic could ever be.

Celica is also mentioned to be capable of casting quite powerful barriers or protection spells, to the point that even eight years after her death, Kokonoe herself still had a hard time entering the area around the church. Besides protection spells, Celica is also very capable of using floating Magic and Magic which can create spheres of light. She knows how to produce lightning via Magic but never actually does so as the noise generated frightens her.

### Noble Phantasm

#### **Minerva; "EX Machina"**

Minerva was an automaton with the Idea Engine equipped. It was an Embryo Storage number 3. Using notes left by Konoe Ayatsuki Mercury and Relius Clover on Machine God: Nirvana, Kokonoe Mercury built Minerva for Celica Ayatsuki Mercury. It both protects her and acts as an amplifier for her powers.

Her power source was a miniaturized reactive furnace (反応炉 hannō ro) created by gathering and combining the energy in all the reactive weapons in the world Kokonoe could find.

Minerva self-destructed to destroy Corpse Burial: Requiem, as it should have exploded as soon as the time-stop ends, destroying the whole world.

#### **Armure Sorbet; "Nurturment of the Sister"**

A healing Noble Phantasm. With her use of sorcery and magic, Celica uses her healing magic to heal both her and Minerva, even able to heal others as well.

It can also be enhanced with Recover Cap, allowing Celica to enhance her healing power.

#### **Atout Rillettes; "Nurturment of Exchangement"**

This Noble Phantasm has Celica heal her opponent to full health. Quite literally, in fact, as they fully recover with no wounds. Minerva then transforms into what appears to be a jet, flies into the sky at high speeds, then rams into the opponent, shoving them away, receiving them just as much damage has they once had before.

### Gallery

#### Fate/???

* Ascensions

1st Ascension2nd Ascension3rd AscensionFinal AscensionCelica's Servant Card
* Craft Essence

Bond CE: Healing LightDirectionally Challenged
## References

https://blazblue.fandom.com/wiki/Celica\_Ayatsuki\_Mercury

https://blazblue.wiki/wiki/Celica\_A.\_Mercury

https://blazbluextag.fandom.com/wiki/Celica\_Ayatsuki\_Mercury

https://www.dustloop.com/w/BBCF/Celica\_A.\_Mercury

https://hero.fandom.com/wiki/Celica\_A.\_Mercury

https://vsbattles.fandom.com/wiki/Celica\_A.\_Mercury