Disclaimer: I own nothing, the rights of Fate/stay night belong to Type/Moon and the rights of Seirei tsukai no blade dance belong to Yū Shimizu.

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Chapter 1- Welcome, Oh Chosen Soul

The shadow would soon sleep. Nestled inside of it's new host, it finalized the changes that it had made in order to be more compatible with the vessel. It had found difficulty when the strange light from before had repulsed it, sent it away from the vessel, into the nowhere that was warm, it was not an unpleasant feeling for the shadow, for it craved anything that was not of this prison, where it had dwelt for millennia.

But the shadow had persevered, and eventually the light had acquiesced, seemingly out of energy. When the shadow had entered, it found places in the body where it could not go, strange portions where the body was of steel. It searched and found quite an interesting place,but it would not yet go there, it was not ready to contend with the vessel's power.

Eventually,the shadow was able to sympathize the vessel with itself, itself with the vessel. The shadow changed the body as it saw fit, twisting flesh, merging shadow with bone. Likewise, the shadow felt itself become something greater, for steel invaded darkness, and fire envigored the night.

The shadow saw blades, swords without peer and without end. Shirou saw the gentle beauty of night, the peacefulness that was both the sign of death and the sign of new life. As the blinding light of dawn came forth, and the sounds of humans drew near. The two thought as one, and then, the shadow slept.

Shirou opened his eyes. His entire body was numb, his mind was foggy and he felt as if he had been forced to run a few marathons. So he promptly shut his eyes for several more minutes, letting himself rest for a few seconds. He remembered…..walking to the cave and seeing Rin. He tried to remember what had happened after that but 'up..down….sideways….knee socks…' didn't make much sense to you either, did it?

Shirou opened his eyes once more, quietly running prana through his body, heating up his circuits to speed his recovery, only to nearly choke as instead of his 27 magic circuits flaring to life, he quickly lost count of the number of circuits cycling an un-godly amount of prana through his body. He quickly sat up to survey his surroundings.

The first thing he noticed was the fact the he was alone in an alley, voices coming from the street that he automatically categorized as possible enemies. As his mind became fully aware, he realized he felt...short. He looked around, seeing now that the walls on either side of him were abnormally tall. Then, he notice that his hair was down to his shoulders and quite a conspicuous shade of auburn.

"Excuse me, are you alright?" heard Shirou from behind him, quickly spinning around to face the speaker.

'He's cute, gotta give him that' thought Restia as she faced the diminutive male in front of her. He looked to be about 6 years old and had shoulder length red hair and appeared quite feminine, even for a child his age. The only thing that could be called abnormal about the child was the sort of strange understanding in his eyes as he whirled around to face her. His eyes were a deep, mesmerizing golden color, that she could have stared into for hours and still not comprehended the strange wisdom they seemed to carry.

She had come to this town in order to find the force that she had felt earlier, but the presence was all but gone, she had trouble tracking down the wrongness, and could not find it. Instead, she sensed a power that was all too familiar, and followed it to this child in front of her.

She saw him take a breath, and was suprised as a startled expression came into view on the child's face. Suddenly the child disappeared, causing Restia to blink in confusion, only to have the youth spring towards her from the side after ricocheting off the wall. As he seemed to attempt something, she easily appeared to his side, kneeing him in the stomach.

"That's no way to treat a kind, generous lady who was offering her help, now is it, little boy." she stated in a chiding tone of voice that gave off an air of amusement.

After all, this was her future master.

Shirou choughed, pain running through his body. He still felt the power running through him, but it would seem, at the girl had said, that he was but a child now. He felt muscle in his arms and legs, but also a new sort of 'immature' softness to them. It would seem that, for the moment, his reinforcement would be of no use. His body was just too different and he had no time to familiarize himself with it with structural analysis right now.

The reason he had jumped into action just then had been a spur of the moment reflex brought upon by years of conflict against inhuman entities. Her distinctive 'scent', something that reminded him of a clear, moonlit night, had caused him to panic. He was currently in a less than advantageous condition, so he decided to play it safe.

"Sorry, thought you were an inhuman monster." said Shirou, not realising the self-damnation of his own words. After a few moments of groveling and a fist to the head later, the conversation picked back up.

"So, what's your name?" asked the lady, a curious expression on her face.

Rubbing his head gently, Shirou said "Shirou, Shirou Emiya, and again, sorry about earlier."

"It's no issue, just remember to compliment young women in the future, Shirou." replied the women, with a smile that may have been just a bit too sweet.

While internally shivering from remembering some of the legendary too sweet smiles that he had been subject to, Shirou considered the young woman before him, she clearly was not human, if the massive amount of prana she was exuding was a tell tale sign.

"Oh, where are my manners, My name is Restia Ashdoll" said the woman, now identified as Restia. Shirou didn't know why, but the name sounded oddly familiar, like a memory that he had just thought of in passing that he had completely forgotten about long ago.

"Well then, Shirou, pleased to make your acquaintance, let's get to know one another."

The mentors of the Instructional School were quite surprised to find that the spirit that they had come into contact with in their search for the new Demon King had not only left the complex without their knowledge, but had brought a child back with her to be tested as a potential candidate. What was even more surprising was the test that would be conducted.

Shirou was confused to say the least. The world just didn't feel right to him, everything was just too rich in magical energy. Even the people here had a certain….radiance to them that nobody did back home. Now that he examined himself more closely, he noticed that things seemed different somehow, as if something had drastically changed and he didn't seem to notice. When he used structural analysis, he only noticed that his magical potential had increased massively, as if his count of magic circuits had increased. This boggled his mind, as such a thing was unheard of, anywhere. He found it difficult at first to control, but the magic seemed to be much easier to handle once he had familiarized himself with the power increase and overall structure.

Aside from his own abnormality, there was the matter of the girl, Restia. She seemed to be rather kind, and he couldn't keep himself from liking her. He sensed no malicious intent from her, so he had decided to put his faith in her for the moment. Which was why they were now in this so called "Instructional School".

He thought it was suspicious, with all the children in the facility, but he decided to withhold judgment until he found proof of their misconduct. When they had arrived, Restia had told him to wait in a sort of central room where the different branches of the complex connected. As he waited, he caught sight of a small, grey haired girl sitting on the other side of the room. She seemed lonely.

Now this would normally have been ignored, unless the person was the type to express unconditional kindness. Luckily, not only was he such a person, he was Shirou Emiya, the foolish boy who wanted to be a hero of him, it was impossible to ignore someone who needed saving. "Excuse me, are you alright" he asked, parroting Restia earlier in the day, as he approached the girl. The girl did not respond, seemingly not hearing him. Shirou decided to press on, something told him that this girl needed his help.

"My name is Shirou Emiya, what's yours?" he continued, trying to get through to the young girl. She finally turned to him, a cold, forlorn look in her eyes.

"Why does it matter?" she responded in an even monotone, completely devoid of warmth. "Well how can we become friends if I don't even know your name?" Shirou replied with a frown,alright, now he was worried for the girls mental health, he had to help her.

"I have no need for 'friends'." she stated in a dejected tone, missing any sort of positive inflection. " Well then, you have no problem with an older brother, do you?" said Shirou, voice filled with kindness and determination. She looked at him, blinking several times,looking utterly incredulous.

He had heard that tone before, when he had first met his own 'little' sister, Illya, for the first time and had tried to reason with her while she was still under the impression that Kiritsugu had abandoned her in favor of him. It was the tone used by those who had given up hope and were about to give into despairing madness.

"So, I'll ask again, what's your name?" Shirou said gently. This time the girl responded quietly, still looking as if she had been stricken. "Muir, Muir Alenstarl" she whispered.

"Nice to meet you, Muir." said Shirou, who was now softly rubbing Muir's head, trying to be as comforting as possible.

They just sat there, being each other's company until Restia returned and told Shirou to follow her.

Shirou whispered "I'll see you soon, Muir" as he walked to Restia's side.

He was not present to hear the words "See you soon, Onii-Sama..." being uttered by the young girl who was staring at his departing form with wide eyes.

"So let me see if I've got this, you want me to contract with you?" stated Shirou in a questioning tone. He was currently on a raised platform in a large, open room. There were the so called "Instructors" off to the side, observing the proceedings.

"Yes,well, actually, it's more to see if you in fact even can contract with me to be honest" said Restia, standing directly in front of Shirou, eyes gleaming with mischievous intent.

She had brought him into this room straight away after fetching him from the central chamber. It seemed that he had to contract with her to prove he was an 'Elementalist' or some such. He had no idea where he was, what was going on, or even who was good and evil. But the two things he could be sure of were,somehow, he could trust Restia, and that he would continue to help people, it didn't matter where he was, he would become a hero of was the only way he would see Saber again after all.

"Alright then, but what do you mean by contracting?" Shirou asked, confused by the term. Would it be like the system that would be used to contract with servants via a master-servant pact?

"All you have to do is take my hand and say the words that come to mind." Said Restia, offering her hand and looking at him with a gentle smile.

"All right…." said Shirou reluctantly as he reached towards her and put his small hand in her palm. He immediately felt words spring to the forefront of his mind, his mouth began to move without him being fully conscious of what he was doing, as if he was only half acting out the actions.

Words fell from his lips unbidden, possessing a force all their own.

"Oh passionate lady of darkness, limitless essence of true night,

you will be mine, to command,to use,to save.

You will defy fate to stay by my side,

and I will be worthy of any praise.

My body of cold steel shall be thy master.

Thrice I command thee,

Exchange vows with me."

As Shirou finished the incantation, Restia leaned down and kissed him of all things, instantly snapping him out of his reverie. Shirou felt as foreign, but somehow familiar, tendrils of energy lanced through his body in an all encompassing wave, leaving a feeling of warmth and gentle elegance "Like a peacefully dark room" he thought, as it all came together all at once on the back of his hand.

When the feeling had faded and Restia had pulled away, he fell down with a look of shock on his face as he gazed down at the purple half-moon spirit brand now located on the back of his left hand.

Just then, Restia spoke, capturing his attention. "Congratulations, Master on contracting with me." She said as she smirked devilishly.

Then the man who seemed to be the speaker for the spectators spoke up. "You have proven your legitimacy, we will train him, spirit." Then as one, each of them turned to face Shirou, and spoke in time with one another with practiced formality, giving an almost eerie sense of oneness.

"Welcome, oh chosen soul, we recognize your feat,and with it, the prophecy is fulfilled, we are pleased to make your acquaintance, Demon King."

Shirou was starting to suspect that he had made a terrible mistake.

"Yes" said Restia "Welcome to your new home." she said with a mischievous twinkle in her eye.

Yep, definitely a mistake.

Chapter End

A/N- Hey guys! I'm back again quite soon. The feedback that I've received so far has been just fantastic, so here is the next chapter sooner than originally planned! In the reviews, it was mentioned that I should not forget Saber, and worry not, this Shirou will not drop her at any time in my story, long live the Avalon pairing! But I make no promises as to Shirou gaining an unwanted harem. XD Also, the 'shadow' will most definitely not be a heroine, so don't sweat it.

Till next time

-Unlimited Blade Quirks

Re- I fixed the magic circuit blunder, no specifics, but should put some of the ridiculousness to rest.