Alter Ego (Fate/Crossover - Jack O' Valentine)

**Alter Ego** (アルターエゴ, *Arutā Ego*) is the servant of ??? in the ??? Holy Grail War.

*"So it was a question of loss and gain after all. Which should disappear: the world, or me?"* - Jack-O' Valentine

## Profile

### Identity

Alter Ego's true identity is **Jack-O' Valentine**, a Valentine unit, a type of Gear created by infusing a human with Gear cells, created by That Man in an attempt to recreate the consciousness of Sol Badguy's wife Aria Hale after she was driven insane by her conversion into Justice. She served as one of his servants alongside Raven and I-no until meeting Sol when they collaborated to defeat the Universal Will. In the aftermath, she agreed to fuse her consciousness with what remained of Aria's. Later, when I-no went rogue, Jack-O' played a key role in her defeat, and afterward decided to settle down with Sol.

In a world where magic would be just another facet for science to analyze a group of sages sought the answer for a perfect existence for mankind, eventually their leader would create an artificial existence to overwatch, protect mankind and seek perfection without harming humans. Over the centuries it went mad for it could not comprehend mankind, becoming a threat its creator sought an apprentice and gave him the task of stopping the existence, now named Merciless Apocalypse (Universal Will). The apprentice would attempt to do so via imbuing two of his best friends with artifacts of world-ending power the Scales of Juno (Eve) and the Flame of Corruption (Adam).

The Bearer of the Flame would be driven mad by the experiment and escaped into the wilds while the wielder of the Scales was nearly possessed by the Merciless Apocalypse, intervening the apprentice hijacked control of the converted body and exorcised the Merciless Apocalypse however this would cause the wielder of the Scales to lose her memory and humanity. After the incident she would be declared an enemy of mankind by the governments of the world and in reaction she took control of the world's biological living weapons, Gears, and waged a war of hundred years near ending mankind before being sealed and later on killed by the wielder of the Flame, Sol Badguy.

Years later the Merciless Apocalypse would attempt to revive the wielder of the Scales, now known to the world as Justice, in an scheme to possess and use her to convert mankind in obedient gears, to terraform the entire world to its perfect vision. The apprentice alongside the wielder of the Flames intervened and making use of the homunculus-like Jack O' they stopped the revival by using Jack O' to hijack the possession ceremony and revive the wielder of the scales completely.

Due to her incomplete awakening, rather than the wielder of the scales, Aria Hale, a childish personality manifested wanting to see and experience the wonders of the world with Aria's personality waking from time to time to teach making sharp observations and guiding the heroes. In a way Jack O's earnest desire and innocence is what facilitated the alliance between Sol Badguy and the forces of the apprentice, her good will working as a bridge where talks could ensue. Dutifully carrying out its duty she delivered the memories of Aria Hale to the resurrecting body of justice and recreated the human Aria Hale perfectly, serving her purpose and spent the childish personality faded away as Aria took over the Jack O' body. Someone whom should have completely faded away yet...perhaps its the wish of the Scales of Juno?

As a servant she lacks the soul of Aria Hale and the Scales of Juno thus losing an immense amount of power compared to when she lived. While she is nothing to sneeze about tactics became an actual concern and lacking the personality of Aria to reign her desires in she will rampage (non-harmfully) with curiosity studying, eating candy, experimenting and playing games until she runs out of magical energy so a good master (parent) is needed to guide and direct her.

### Appearance

Jack-O' Valentine is a slender young woman with fair skin, red eyes and long white hair with red highlights on the underside that goes past her hips. Her most prominent trait is the compass-like pale yellow halo hovering above her head.

Jack-O's main outfit consists of a white skin-tight one piece that loosens up and has slits at her forearms and calves. She wears an ankh pendant, a black belt with a gold skull buckle on her waist, and her arms are decorated with similar belts. She also wears black and red gloves and matching heels. She also wears a Jack-o'-lantern-esque removable mask and prison weight chained to her left ankle. Both are black in color and give off a light green lantern effect in their skull-themed eyes, nose and mouth. At the end of Revelator, her hair becomes fully red.

In Strive, Jack-O's design remains mostly the same, with the only differences being that her hair color changing to being predominantly red with white highlights on the underside, her eye color changing from red to green, as well as her halo becoming cracked.

### Personality

Because she was awakened in an incomplete state, before she could download half of her soul from the main body, her memories and personality data are fragmented and unstable. This instability has resulted in the side-effect of a split personality of sorts: That of a cool and collected adult woman, and a child-like one that is playful and cheerful, with her voice changing accordingly. The way she refers to others changes as well: her child voice using the honorifics ちゃん (-chan) and くん (-kun), while her adult voice drops them almost entirely and uses a more neutral tone. Despite the changes, Jack-O' does not actually become a child on the inside.

Inside her remains the portion of Aria's soul that loved Frederick, and related memories; at first, not quite able to recall information of him or his name, she was created with a complicated feeling of nostalgia towards Sol. Being "a piece of Aria", Jack-O' doesn't consider herself to be Aria, whom she has called the "original owner" of her body, thinking of herself as a temporary, replacement personality with artificial emotions. Although she finds unsettling that "nothing" is all she has, she is nonetheless well aware of her destiny or purpose—protecting the world—and is willing to fulfill it despite what that may mean for her own existence.

Yet, while thinking of herself as disposable, Jack-O's ego starts to become independent, refusing to take off her halo after becoming human. Though she claims otherwise so that others won't notice, Jack-O' knows she has emotions, even if she may not fully feel them. Unable to accept herself, she doesn't reject herself either, falling in love with Sol despite herself.

Initially, not having "established" herself in this plane of existence, Jack-O' needs some candy as a supplement, or wear her mask, but as days pass and she stabilizes, she is able to forego their use. Following the fusion, she remains in an unstable state due to Aria's consciousness within her, and may start acting child-like again if her emotions get the best of her; to keep her composure in check during battles, she continues to use her mask.

## Abilities

Claiming to have a thousand years' worth of knowledge of her role, Jack-O' is shown to be extremely knowledgeable about both magic. She seems able to state precise information about a concept, object or person simply by examining them, such as Johnny's ship, the power and the magical knowledge of Bedman, and even deeper subjects like I-No's and Axl's origins. Furthermore, Jack-O' is able to gather information on unnatural phenomena via the use of sensors, or to research via her Organ Deployment technique, such as a person's records, although she could find nothing on Bedman, leading her to think he'd erased them completely.

Jack-O' has the ability to self-regenerate, and unless the wound is instant and fatal, she is able to recover over time without treatment. In addition, she has a fail-safe "seed", the Scales of Juno, planted inside of her by That Man to ensure she stands against the Absolute World. Jack-O' has immense destructive power, such that Sol Badguy was taken aback by her strength. However, her divine seed is later removed, making her a "regular" human, though likely not entirely.

Her weapon of choice is an iron pumpkin flail, which allows her to trap the enemy, fly, and shoot green blasts of magic; it is actually a familiar named Dopros, being fairly similar to Lucifero, but is non-communicative.[source needed] She can also create "white pumpkin houses" that summon three kinds of minions: one with a spear that can perform combo attacks, another with a sword that can fly, and the last one with a staff that can perform anti-aerial attacks. The house's level can increase, becoming more resistant and deploying minions with upgraded weapons. Jack-O' can boost her minions' strength or even make them explode alongside their houses. She can also create an Aegis-like barrier to protect herself from projectile attacks and her own explosions.

### Skills

#### Personal Skills

* Clairvoyance (A Rank): Extremely knowledgeable about both magic and technology. She is able to state precise information about a concept, object or person simply by examining them, such as how she knew the year and the speed of an airship, the power and the magical knowledge of a dream manipulator equaling Merlin, and even deeper subjects like the origins of a time-traveling witch. Manifests as the skill of a scientist rather than a mage/divinity so rather than possessing eyes that understand the world it's more of an understanding of the laws/rules that compose the world and those who must obey them

* Backyard Access (E Rank): In Jack O's world certain individuals have reached into the data that compose the known universe. Named Backyard it contained all the data of their planet. It was from this place that Jack O' gained a massive amount of power via absorbing magic from its ambience and created 'servants' to aid her fight. By marking a territory Jack O' is able to open temporary gates to the Backyard and take energy from it. Works akin to Territory Creation and within it Jack O' is able to use the skills Summoning and Mana Burst

As the Backyard exists in 'Layers' usage of this skill is somewhat allowed by the Human Order but digging deeper will inevitably gain the Counter Force's attention and Jack O' will refuse to use it beyond this anyways, if forced by a Command Seal then she will 'obey' by opening a dangerous layer and dooming her master, afterwards she will quietly fade away

It is said to contain all the information that creates the real world. It is also an encapsulating term that refers to the source of limitless energy known as Magic. It is the codex or source of transferred information that comprises most of the world as physical manifested data; the source of what makes the real world exist. The world itself is said to be a virtual space, resulted from the information conveyed from the Backyard.

* Valentine (A+ Rank): The Merciless Apocalypse would create puppets modeled after Aria Hale and named them Valentine, the apprentice would analyze those puppets and create one of his own perfectly fit to ruin its plans. As Jack O' became the vessel of the original soul her 'ranking' lays closest to the original thus granting her access that denies Justice herself. Nullify the usage of wide-area terraform, removes defensive authorities and negates mind-interference magic

* Atlas Chain (C Rank): A fighting style consisting of restraining oneself and then bursting full-force alike a berserker. To calmly prepare the pieces only to later rush like a predator. ATK falls while DEF rises, then on the following turn ATK rises while DEF falls and damage further increases according to the damage taken last turn

### Noble Phantasm

#### **Scales of Juno; "Seeds of the Absolute World"**

An attempt of replicating the Scales of Juno however as Jack O' lacks the soul of Aria Hale and her own personality is not pacient enough for things beyond immediate results it ends up manifesting as massive explosive energy delivered by physical strikes. Truly gods and humans alike would weep at the usage to the foundation of an entire world being used in such a brutish manner.

If the Scales are mismanaged via the usage of command seals or Jack O' is corrupted/controlled by external factor her existence will inch closer to that of Justice/The Merciless Apocalypse, and she will begin to manifest their characteristics to the point Jack O' might be hollowed and possessed. Not something that happened in 'life' but due to being 'empty' while possessing a deep connection to Aria Hale, Jack O' connects to those possibilities as well while lacking the former's defenses to resist it.

On the other hand if Jack O comes to mature and love her master while acting for the sake of defending humanity's right to choose she will align 100% with Aria Hale and deliver a miracle.

### Gallery

#### Fate/???

* Ascensions

Jack-O Rev WardrobeStrive WardrobeFinal Ascension
* Craft Essence

Bond CE: Trick or Treat!
## References

https://guiltygear.fandom.com/wiki/Jack-O%27\_Valentine

https://hero.fandom.com/wiki/Jack-O%27\_Valentine

https://vsbattles.fandom.com/wiki/Jack-O\_Valentine

https://forums.spacebattles.com/threads/summon-a-servant-mark-vi-the-dark-six-f-sn-crossover-servants.370875/page-366?post=67988449#post-67988449

https://aminoapps.com/c/anime/page/item/jack-o-valentine/1etr\_ILRBNplMg4wYeMXP3VDVk73lX