This is a variation of the original route of Heaven's Feel... kinda going into something akin to an Illya route, but instead of a romantic route, it's more of a family route.
—One Piece is the creation of Eiichirō Oda and the Nasuverse and all its variations belong to Type-Moon and are the creation of Kinoko Nasu—
Prologue
The Soul.
That which is known as the Second Element, and the Record of everything that made a 'Self' themselves.
Thus, even while being an unborn being, the 'Sword' could comprehend things before these happened.
The moment the being's heart had its first beating, it started to dream of many things.
A war.
Not a war of nations, but a war of seven people of mystical powers and the supernatural beings beyond humanity that answered their orders.
The first memories were not beginnings, the first memories that filled the Mind of the new being that was taking shape inside a monstrous being were memories of ends.
The first one was the end of two adults as they melted under an inferno that the 'Soul' of the 'Sword' tried to suppress at all costs.
The second one was under the light of the moon to the side of an old man as he drew his last breath... the words that came out of their mouths were important but the memories were surrounded with static and missing parts, like the face of the old man and their surroundings, but the memory that he died shortly after their talk with a soft smile on his face was not forgotten.
And the third one was the reason why the memories found in the dreams that the Soul of the 'Sword' had been blurry on average, for the creation of a Sword beyond human capabilities was something that couldn't be done without a sacrifice, a feat that had to be done if the end of the Evil God was to be secured.
Then, the dreams turned into nightmares, memories upon memories of bloodshed and battlefields, of being a puppet under the strings of something far greater. Another of those nightmares, this one different from what seemed to be an eternal circle of murder, seemed to be about being on a table as they did many things to the small frame of the body of a little girl, the only noise in those memories were the screams of the little girl.
The heart would beat faster in those memories, not in fear but in... outrage and impotence.
The little girl of straight white hair was someone important and the dreams showed it, despite most of her face being lost and only her ruby eyes, hair, and smile being the clearest parts of those sweet dreams.
One of those sweet dreams, a beautiful person under the light of the pale moon, someone so beautiful that made even the crude armor they were wearing into a piece of art and the sound of steel that the sword of that androgynous person whose features leaned to the more feminine side than to the masculine ended up sounding like the tinkling of bells.
The beating of the heart upon that memory was also rapid, but the difference was hard to place with just a single dream, and it took over ten to vividly recall how the beautiful image of the knight under the light of the moon stole the heart of the 'Sword'... it was love, the 'Sword' loved that person.
And the favorite of all those sweet dreams, the laughter of four girls, a woman that acted like a child and a woman. The happiness and warmness that was in the heart of the 'Sword' at that moment, a sense of accomplishment and a declaration to a deceased one.
The Soul of the 'Sword' was melted to a certain extent in the Origin of All Things, and given shape once more in this safe space inside a strong being of size beyond human capabilities.
A broken and unstable machine built from the pieces of three other machines turned into a factory, beating as strong as the heart of the small body that the 'Sword' now had.
Small and strong... however there was a small problem, the new biological mother of the 'Sword' was young, so young to the point that the 'Sword' would consider her a child.
It didn't help that the 'Sword' had tried to apply the things found in the dreams.
This was discovered after spreading her internal energy through herself— Finding out many peculiarities that she couldn't remember finding in any of the bodies in the dreams, not even in those that had been altered—, apart from discovering the gender that she had, and her body was more developed despite barely having become a six-month-old being, a body filled with scales that the 'Sword' assumed that would hurt her parent when she came out, no matter the small number of feathers that covered these along with a tail and a pair of wings of the size of her body that clung to her body and another pair in her hips, surrounding them, with the same structure of slightly hard scales covered in feathers.
It would be painful to pull her out... and her existence was beginning to annoy her mother!
Her mother seemed to have great control of her muscles to such extent that she was forcing her to be born before the nine months that any healthy baby should be born in.
The formed claws, which could leave deep scratches upon rocks, subconsciously grabbed the (Supposedly) soft flesh, only to find herself being unable to grab ahold to anywhere, much less leave a scratch on it.
It happened so suddenly... one moment there was peacefulness and the next, she had been grabbed by the throat before being launched to somewhere hard...
A sweet dream filled her last bits of consciousness after screaming from the top of her lungs trying to burst out her internal energy everywhere in a hasty attempt of protection.
The clear version of a dream she had many times before, of the childish woman being serious for once in her life.
'Ne, Shirou... you are Illya's older sibling, so you have the sacred duty of protecting her.'
"Heh, I shouldn't be surprised that you are alive, brat."
He was small in size but had a slightly deeper voice than average, dressed in the typical white attire of a cook, which was covered in many sorts of substances used to create pastries. Large eyes and lips found on a small face, curly hair that reached his shoulders, and a sword held in his hand, not even bothering to put it in a secure place to ensure that the unconscious baby, no longer covered in blood, amniotic fluid, dirt nor the water of the rain.
"I don't even know if I should even be surprised that you released such powerful Haoshoku at that age."
To even put him to his knees... him, indeed, one would have a point saying that he was not the strongest out there, but he was still a pirate of this hellish place called 'New World', he was no pushover that would be put down by such things, at most that he had suffered against users of such useful thing was for his body to tremble to the point that he almost thought that there was an earthquake that was leaving him disorientated.
"You are the child of that monster after all."
Burying his blade right next to the head of the baby, purposely having the blade falling close to the cheek of the small baby to see what else had she inherited from Linlin.
"Tch, a monster will always give birth to a monster, after all."
The blade had turned to the side rather than cutting the cheek of the baby.
"Not even a scratch."
Linlin's child indeed... no matter how cute the baby was, she would still grow to become a monster that would be feared by everyone.
Analyzing the baby from head to toe... she was small compared to what he would have expected a Linlin's child to be, then again it was a miracle that she was still alive after being pulled out of the womb by force as Linlin found herself annoyed by the bump on her belly, declaring that it made her blood boil after having drunk for the first time some beer.
"I wonder how much of a monster she would have become after the nine months."
Streusen shivered at the thought of another Linlin, then again, it could be that she was actually fully developed months earlier as she didn't have any sort of breathing problem or was straight-up dead, those feathers like that of a bird made her more inhumane than her underage mother already was... no matter how fluffy these looked, spreading apart the feathers to see if there was still something to clean, he noticed something curious as soon as a sting of pain made him retract his hand from the place he was touching.
Scales.
Under those fluffy-looking feathers of brilliant red color, there were dull scales of black and silver, spread in many places as if it was a natural armor.
Hot scales that he believed he could use to fry an egg... that explained why it had come so much steam after having been washed by a bucket of water.
"Can I drop her into the sea?"
It would save him the trouble of having to be forced to bath her using soap, that was most likely going to melt under the heat of her scales, and use his precious hands to wash the brat.
A big no-no.
Who would cook for Linlin?... Why would Linlin keep him if he wasn't able to cook her food?
He wouldn't do such a thing to his source of treasures.
"No... she could prove useful."
More monsters, more treasures after all!
"But what did Linlin even fucked?"
The parents of Linlin were average-sized for what he remembered from what she had said, Linlin's mother having committed adultery with a giant being the sole explanation to her strength and size. But this child seemed to be going to grow in human height limits rather than giant height limits, the scales and feathers could be the ones of a beast, but that couldn't be it, Linlin wouldn't do such a thing, hahaha... right?
God, he wanted to throw up to the idea of Linlin doing it with a feathered lizard thing.
It was disgusting in every single way possible, even morally, despite him having really low moral standards, this crossed the line.
He should have had to give her an explanation of why she shouldn't even try to do it with animals, it was... ugh!
God, he should just simply tell her that she should only do it after reaching the majority of age so that it wouldn't bother her the next time she decided to have one, as she had actually expressed her desire to have children many times, and that anything other than human-shaped beings could not have children with her.
... Even thinking about telling Linlin that made his insides go wild.
"Pi~Pi~"
A bell-like sound, followed by a fluttering sound of wings flapping rapidly, he subconsciously pinned it against the cutting board, most likely some insect that decided to bother him... it did not feel like an insect, it felt like—
Streusen looked at the thing on his hand, the answer as to the unspoken question of who was this child's father... and laughed at the disgusting image of such a little thing losing its way and finding itself in there. When had it escaped there? As he would care, he shouldn't even be thinking about such a thing as it was disgusting and would ruin his inspiration to create good food.
The thing was really small to the point that he, a human of 1.4 meters was able to grab it on one hand, with only its head, legs, tail, and neck escaping from his grasp. It looked ethereal, shining brightly with a white light that escaped to the sky, its fearless eyes were of pure silver, the scales and feathers of the very same color... though that, ethereal factor was suddenly stripped away when the light faded out and its eyes became less vibrant and frightened at its current situation.
"So someone used you, huh, little thing?"
A Devil Fruit user who could control animals in this way... he couldn't remember anyone famous with such power, nor had he heard of a beast of this form.
Then again, the Grand Line was a place of many unknowns, this little beast could be one of them, maybe he could sell for a lot?
The bump on it was something he was curious about, though... the little thing had not only his life but was also carrying over fifty.
... Yes, with this shape it would make a fine pet that would sell for a lot of bellies.
He hummed an upbeat song, thinking of all the money he would gain from these beings being sold and the new monster under his clutch to grant him more treasures, unaware that the creator of these beings was staring at the child whom she had allowed to live again.
This is all I can do... sorry, Shirou, Illya-onee-chan is sleepy.
Before disappearing into the next life, it's last thoughts, in the image of her big brother using the jeweled blade that they had re-created as an artifact to summon and empower his Last Projection.
The little fairy would probably remember much less of her big brother, her fading power not allowing Illya to ensure every detail of the life of her brother... sister, only wishing for her to live... would she be sad? Would she be frustrated and begin to fault herself for their fates?... Illya hoped not, Illya just hoped that this new family her beloved sibling would have would be a good one.
And thus her soul faded to return to the Ring of Reincarnation, to the next life.
Author's note
Ummm... was it good?
I would like to know what everyone thinks of this and what mistakes did I make, it would help me to better this story that had suddenly appeared on my mind. I have a really bad memory and despite these two being some of my favorite series, I don't remember as much as I did when I was completely invested in them.
I think that the backstory is... decent, not too good, not bad either, I believe that it could have been better but after a few attempts of putting this idea into 'paper'.
Also, to clarify a few things, this child is- in a way- like No Name as they have the same origin (Emiya Shirou) but are different beings (In the case of No Name, if I remember correctly, he is the combination of all unnamed heroes, while this child is the combination of the souls of the broken pieces of Emiya Shirou, Archer, and Illya, but in a way, mostly Illya as Shirou had broken his soul to the point that not even the incomplete use of the Third Magic would reconstruct his Soul in this backstory).
SOMETHING EXTRA:
-Regarding Unlimited Blade Works... to allow it or not, it's up to you all as I still cannot choose between the two options.
- Why the memories that she possesses are blurry?... It's already a miracle that she hadn't lost any of them, as it had not been transported to another world but rather reincarnated in it, which means that her Soul has passed through the Root, which in normal conditions would mean the complete death of the 'Self' that had not achieved something noteworthy for the World to record.
-There was a different Rider, who?... kinda obvious considering where the world of this fanfic is set in.
-What happened to the sisters? Well... they were separated in life but in death, they were together.
-Why did I make the child a non-human and a girl? The gender part is easy to explain, Mamamiya for the Charlotte family, and by putting that the most complete part of the 'pieces' that made the soul of this child is the one of Illya, I believed that it would be something that would influence in this reincarnation. The non-human part... I don't know, it suddenly seemed like a great idea, 'The surviving part of the older sister survived long enough to ensure that she would be safe, but didn't check if the family she was going to be born in was the most functional one).
- 'Emiya Shirou' ends up becoming the first child of the Charlotte Family before Perospero, as such there should be consequences regarding that and the only idea that I had was that she would be having children earlier than in canon but I don't know... as Linlin had just turned 13, it is already really wrong, but I personally believe that it was when she entered the Rocks' pirates that she begun to have children like crazy.
- Devil Fruit?... Should she? I mean, Emiya Shirou is already strong by now if I were to alter the world and allow it to use Magecraft (Which I really don't know if I should as Magecraft is known to work under a Foundation, if there is no Foundation, there is no Magecraft... at most, it would be the spells that Shirou had learned but even that I don't believe it would work if there is no Foundation from which these Spells had been built upon).
- Why give her Haoshoku haki? She is a child of Big Mom, that type of Haki is in the blood. Also the other type of Haki... Mind's Eye is practically something similar Kenbunshoku and Reinforcement could be seen as a weaker version of Haoshoku, both born out of the energy of the Soul rather than the Will of the user, but I assume that a trip in the Root, surviving the Recyclement of the Ring of Reincarnation thanks to the Fairy to the point that it wouldn't lose so much would allow the child to be a part of the World she was now in.
Thank you for reading, I hope that you had liked it.
See you~