Disclaimer: I do not own Fate/Zero or Kingdom Hearts. I only own my OC characters.


Fate/Catalyst

Prologue Part I: To Fuyuki

My name is Heiwa Hiraishin. Or at least that was the name I gave myself after learning Japanese. I don't know much else about myself besides that…well maybe some interesting traits, hobbies and goals that I forged with the help of others. That's pretty much the only basis I have that makes what I am now. I wonder if they could be easily reset and started anew? …After all the experiences I had, I wouldn't want to think about it.

I always thought of myself as an oddity. I definitely could not be something mortal. What am I? Something akin to God…no, the term 'God' just seems to be a vague term now.

But my identity is rather irrelevant to the story about to be told. A multiverse located within…I could not truly explain it. Something like that would require the mind of a much higher being. In that case, I will use a coin as an example. There are two sides to a coin: heads or tails. Think of the location of the multiverse as a square millimeter on the heads' side, maybe smaller. Where I am is supposedly the tails' side.

In this multiverse, it would seem like an endless number of individual universes within. Then again, is there really an end to anything? Anyways, the story takes place in one of the many universes, on a planet Earth and in a Japanese city known as Fuyuki. The timeline in that universe indicates it to be in the early 1990s currently.

A war is what this particular event is…well, more of a competition than a war. Seven magi gifted the title as Master by the Holy Grail shall fight against each other in a battle for the Grail. But they do not necessarily fight themselves. The true combatants would be the Heroic Spirit each participant summons forth from the Throne of Heroes, otherwise known as a Servant. Possessing power far beyond a 'normal' human, Servants will fight against each other until there was only one left. That Servant and his or her Master shall have their wish granted the Holy Grail, said to possess omnipotent power.

How do I tie into this? In truth, I was only going to be in this world for ten days to clear out waves of Heartless attacking this world. Why Heartless? Well, there was an incident that occurred a long time ago that linked the world of Heartless to different universes outside of theirs. Including this particular universe it seems. I only got involved in the war by coincidence. Yet…I took this opportunity to learn as much as I can about the war itself. Before I knew it, I was actually fighting in it.

It was about one week before the competition started. And that was when the story begins.

=O=

Heiwa's POV

"Oi, big brother…big brother, snap out of it!"

Coming out of my thoughts, I turned to source of the voice that I could easily recognize. My younger brother, Kinto, was tugging on my right arm. He was a young boy about nine years old, with spiky blonde hair and emerald green eyes. The only attire he had on was a simple T-shirt and shorts, along with red sneakers. The look on his face was of mild irritation, but his innocence and age made it look rather cute. Then again, aren't a lot of innocent kids like that at this age?

"Geez, big brother, you just seemed to zone out there for a minute," exclaimed Kinto, "I tried to get your attention, but you didn't hear me so I had to pull on your arm."

"Ah, sorry. I got lost in my thoughts for a moment there," I apologized.

My little brother and I live on a small landmass about two miles across…and floating in what seems to be space. All we could see around us is the pitch blackness of space and a few swirling masses in the distance that look like galaxies. There were no stars.

The small landmass we were standing on was the only sign of vibrant color here. It was covered in green with a few small hills. There was a small lake and a single brick house that we live in. How this life survives in the fabric of space is something that defies normal logic. The small body of water was barely ever used because we don't need water to live in the form we are in now. Our bodies are not made of flesh or function like the body of a human. It would be confusing to explain this.

Staying on this small landmass with such an empty backdrop gave me and my brother a rather blank feeling in us. The only places we could ever see much more vibrant life than this is in the worlds that we were sent to in order to fulfill missions, each of them seemingly serving no purpose for the issuer in my opinion. But I made use of these opportunities while they last. And thankfully I had the ability to activate a hammerspace in the form of a dimension accessed by portal to store things that I collect from the other side.

I wonder when 'it' will call upon us again.

"How about we have lunch, little brother?" I asked Kinto. "We may not be able to have hunger, but it will pass some time while we're waiting; perhaps, I'll try one of the newer recipes."

It also confuses me if time actually flows here…I'll simply assume it does.

"That sounds good!" my younger brother replied with glee.

And just as we stood up and began to walk back to our little house, we felt something swirl into existence behind us. Turning around, we saw the one thing we were waiting for.

It looked like an area in the fabric of space sectioned itself out and began swirling in a nebula-like shape. A white hole appeared in the center.

"Ah, it appears we'll have to hold off on the thought of food for right now."

"That's just not fair."

Kinto and I ran towards the spiraling portal and leapt into it, being sucked into the vortex. I felt the world was spinning around, and the rotation grew faster and faster.

And then…we vanished, our beings having left this universe.

=O=

The world was white…I literally mean it. I am not passed out or blinded. The form of the Empty World is this appearance. A blank whiteness that stretches on endlessly, nothing else distinguishable.

The Empty World is a plane of existence in between my omniverse and the one on the other side. It is the one thing that binds the two together, its only link. I do understand this at all. Why are there two omniverses, or why the Empty World holds the two together? But I have a feeling I wouldn't know anytime soon; I did not learn or understand the reason even after all the times I traveled back and forth between them.

"Big brother, don't you think you should bang your cane on the floor already?"

"Two things, Kinto. One, there is technically no floor. I simply make that motion each time we come to signal our presence in the realm and activate the link between worlds. And two, this is not a cane. It's a staff."

Not wasting any more time on the conversation, I lifted my staff by the head and struck down with the tip. My cane then stopped short as a ripple than expanded from the point of impact. It spread outward a few more seconds before vanishing. And a new object began to fade into existence.

A simple mirror completely made out of glass. It was transparent enough to see right through to the other side. The mirror was suspended in mid-air as it simply hovered there.

My younger brother then ran over to mirror and skidded to a stop. He turned around and waved at me with a grin.

"Come on! No time to waste! Let's go!" Kinto had shouted out to me with eagerness before leaping through the mirror. He passed into it like water as his body began to slowly vanish into the glass. He didn't come out of the other end of the mirror. There was no trace of him.

I let out an internal sigh. My younger brother has a tendency to recklessly jump headfirst into things without thinking. What am I going to do with him? He doesn't even know our mission yet.

"Empty World, can you hear me?" Voices can't echo in this world, so I had to partially shout. "What is it that you're asking of us now?"

There was brief silence before I heard a voice softly speaking to me in the back of my head.

A flood of creatures of darkness. Assaulting the city for a length of three weeks. Eliminate the onslaught and avoid casualties…

It appears that it was the usual task of destroying the Heartless. Looks like it's up to me to accomplish this mission. But for a duration of three weeks does seem rather odd. At most, it would usually be a few days before our mission was over and we were sent back. Perhaps, there was something unique in this universe that attracts so many Heartless.

I walked toward the mirror that was hovering in front of me. These mirrors are a portal that leads to a pathway known as the Link Tunnel, which my brother and I usually travel through in order to reach the omniverse.

The layout of the tunnel can be explained like this. Let's call our omniverse 'A', and the other omniverse 'B'. The Empty World will be called 'C'. From A to C there is pretty much only one path that remains indefinite each time. We can only access it if the Empty World itself opens the path for us. Then from C to B there are an endless number of passages that branch off into various points on B. Nothing from B can go to C, but C can get access to B any time. However, we cannot get to there on our own due to the sheer quantity of passages. The Empty World usually shows us the way via a trail of spheres.

"…I should probably catch up with Kinto."

There wasn't much else I could say. I should probably finish this mission as fast as possible.

…But I get a feeling that this will be one of those few 'adventures' in which we get pulled into a world's affairs.

=O=

Heiwa felt himself falling as he plummeted through a framed tunnel, illuminated with a rich, golden color. It was massive in size and had many smaller passages branching off of it. I could see my younger brother just up ahead, looking quite lost.

"…That little idiot."

I flew down the passage next to him. My sudden presence seemed to startle him out of his thoughts.

"Oi, big brother, where were you?! I can't even find the correct way without your help."

"Well, someone was certainly impatient enough to simply leap into the mirror without knowing of our objective first."

Suddenly a path of light orbs suddenly appeared in front of us as it led down one of the passages. It looks like that's the direction we have to go. But…

"Hey, let's have a race!"

…Typical Kinto. But I suppose it would speed up the process of travelling. Who knows how long we have to go until we reach our destination? Might as well pass time this way.

"If you say so, little brother."

"Then it's settled. See you in the next world!"

And my brother rocketed down the passage that the path of orbs leads through. I would want to comment on how his words actually have a very ominous meaning, but I should quickly follow my brother if I don't want to lose him.

Concentrating my energy to my feet, I caused a combustion-like reaction to occur near that area. The energy channeled to the soles of my feet will propel myself forward like a rocket. I launched myself after Kinto down the passage. Hopefully he hasn't gone down too far ahead.

In only a few moments, I found Kinto weaving back and forth through the many passages of the tunnel network. He always had a knack for incredible speeds, but he shouldn't forget this.

"You inherited this from me."

I quickly began to accelerate further, channeling greater amounts of energy to quickly begin closing the gap between me and my brother.

That is, until I felt myself blank out.

…It was strange. This usually did not happen when I travel through these tunnels. I couldn't think further on that as my mind started to fluctuate-

ZZZZZZZZZZZZ…..BZTBZTBZTBZZZZZZZZZZZZT

Pain seared through my head as a high-pitched noise resounded through my eardrums. My vision was blurring horribly as my mind started to picture a completely TV static-like image that produced a very loud noise. Suddenly, it stopped.

My mind started to return as I saw an image start to fade into view into view in my mind. It…looked like a statistics chart of some sort. But I couldn't read its contents as it was still too blurry to discern any detail.

Vision began to return to my eyes as I saw the now empty passages. The trail of orbs still remains, but it appears that my brother went on ahead…I better go catch up with him.

I proceeded to follow the trail of orbs, going down the passages uniform in appearance and structure. Watching this fly by as I head down the passage once again gave me that dull feeling inside. The same feeling I get from watching space. Now, I really couldn't wait to get to the new world.

A minute later, I found my brother standing before what appears to be a portal of light. He had a small frown on his face.

"You're slow, big brother," he grumbled before inquiring, "What the heck were you doing?"

"Sorry. I just felt a little sick back there."

"…Is there something wrong, Heiwa?" my brother asked worriedly as he floated up to me. I looked down at his troubled face and replied, "It's nothing you need to worry about. Well, let's get going."

Kinto hesitantly nodded his head before flying into the portal of light. I floated up to the portal and entered it myself. My surroundings were then bathed in light like what usually occurs during trans-omniversal travel. But then something unusual happened.

"Guh-?!"

I felt searing pain throughout my body as I went further into the bright light. Clenching my teeth, I mustered whatever I could to ignore the pain as the transfer process completed itself. And then I saw only white.

Engaging structure alteration…

Adjusting body and power to adaptability of world…

Reformation complete.

Spirit: ?

Master: -

Class: …Caster…Saber…

Wielder


=O=

Week 1, Day 1

3rd POV

"…What was that?!"

Heiwa regained his sight as color began to appear in his view. Those colors began to take shape as the sun, sky, and a forest of trees. Heiwa analyzed his new surroundings as he tried to ascertain an approximation of where he is and where to go.

His eye caught sight of his younger brother getting off of the ground. Kinto clutched his head and groaned as the migraine in his head settled. The younger brother glanced up at his elder brother.

"Oh, hey big brother!" exclaimed Kinto.

"Ah, you're awake. I haven't figured out where we are yet, but it seems like we're in a forest."

Heiwa actually managed to discover much more within that time frame, as he could feel an energy coming from within the earth below them. He discovered it to be 'mana', a type of energy often associated with magic. However, this piece of information does not give away where he was, as many different worlds use mana.

"It looks like we won't be able to find out so much by staying here. Let's go, Kinto."

"To where?"

"That way."

"Why that way?"

"Because it should lead somewhere."

"…"

Thus the two didn't say much else as they walked off in the randomly pointed direction. If they are lucky they might find civilization.

It only took a few minutes for them to wind up right next to the entrance of a large temple in the middle of the clearing. It appeared to be a Buddhist temple. Perhaps they are somewhere in Asia?

"Oi, bro. Getting ideas on where we are?"

"…Let's take stairs downward." Heiwa pointed down a long set of steps leading away from the temple. It was a very long flight that weaved a path through the forest. "There may be a chance we'll find something."

Kinto let out an exasperated sigh before running down the stairs. He made sure to get the placement of his feet correct so he wouldn't trip. The young boy got used to the timing in seconds and began run down the stairs at high speeds not normal for kids his age.

Heiwa simply followed suit by walking down.

=O=

"Whoa!" Kinto gasped out in awe as he looked at the surrounding buildings. He was not new to city and suburban structures, but the buildings never cease to awe him. How long has it been since he saw a human world house? It felt like months. His brother said that they were somewhere in Asia, but it must be a more industrialized and modern time period they landed in.

Well, that was good. He felt more in place with the modern society of people than any other structure.

"Hey, bro, it's been quite a while since we've been to town, right?"

"…"

"Bro?"

"Hmm…Fuyuki City, Japan?"

Heiwa glanced at his surroundings while he held a small brochure he picked up earlier. He did not recall a city by the name of Fuyuki actually existing in Japan.

Well, their first priority should be…establish a base or search the city for Heartless? Well, he had innate talent of detecting the presence of Heartless for miles away, but this shouldn't be something to rely on. They should set up precautions in case Heartless head outside city perimeters as well, which they were currently almost out of. They would take a quick look in this area.

"…"

"Hey, big brother! Isn't that a school?"

"…?"

It was true. There was a local elementary school nearby their position.

"Yatsushirodai Shougakkou..."

…but that's not of significance to them right now…unless…and it is outside city perimeters as well…extending…!

"Hmm…I suppose I should give it a try," Heiwa mused to himself. "Kinto."

"Eh? What is…it…bro?"

Kinto looked nervous as he saw his brother's eyes shining a bit more brightly than usual as he gazed at the school. This may not turn out well.

=O=

"Oi, bro, did you really have to send me to school?"

After re-entering the limits of Fuyuki, the duo decided to begin a thorough investigation of the Miyama district.

"Of course. I figured you should do something during our stay. You still don't possess enough experience and fighting prowess to combat the Heartless. Now, enough of that. Let's begin discussing a plan for our next actions."

Here was the plan. First, they would locate a vacant house in Miyama to rent as their temporary residence. Since Kinto would be going to school, they should design a background that blends in with the way of society. It would be hardly ideal to camp out in the woods for an entire three weeks. Next, Heiwa would go to the library to research more upon their current environment in order to establish any preliminary measures against the Heartless. Sega will patrol Miyamachou for anything unusual whenever he could and take a brief look outside the city after school.

The Shinto area was going to be a problem, as it was large in area and crowded with people. It would be a likely place for where Heartless will spring up. But it would be difficult to find them. He would just have to devise a countermeasure for that.

Suddenly, Heiwa heard a small growl. Turning to Kinto, he found his little brother slightly blushing from the fact that his stomach just grumbled.

"Uh…bro, when are we going to eat?"

Heiwa remembered that since they were currently in mortal bodies, they would experience the symptoms of being human. Such as hunger, sickness, etc.

"I suppose we should, if you're stomach is any indicator."

"…Urusai…"

=O=

"Remind me why we came here, big brother?"

Kinto spoke to his brother in a sarcastic tone as they sat a table in a place called Koushuuensaikan Taizan, a Chinese restaurant located in the Miyama shopping district. In front of them were several plates of food: mapo tofu, curry, and noodle soup. All with one thing in common.

The young boy had been suspicious of the restaurant ever since laying eyes upon it. There were no windows, allowing no hint of what was going on inside. There was steam coming out through the open front door. Lastly, there was just an aura about it that gave him a bad feeling.

However, Heiwa insisted that they enter, since he felt in the mood for 'spicy' foods. Kinto asked him how he would know the restaurant would have them.

"Smell of spice in the air around the restaurant and the steam. These are somewhat indicative of the cooking of very hot foods. Besides, my instincts just tell me."

"Well then, itadakimasu," Heiwa spoke before he picked up his chopsticks.

"Uh…yeah." Kinto did the same. He then slurped up a strand of ramen.

"…ATSUI! CALIENTE! CALIDUM! HOT! MY TONGUE'S ON FIRE!"

Kinto, in frenzy, grasped the glass of water on the table and gulped it down. He let out a gasp of relief as the water cooled down the sensation. The young boy looked at his older brother to see his reaction.

"…This mapo tofu has far too much spice," Heiwa noted with a neutral expression, "A normal, average human would have felt incredible pain eating this food."

But he continued to eat it nevertheless with a straight face. "Perfect to quench my taste for spice."

Kinto would have gaped at his brother for his lack of reaction towards the cuisine from hell, but he just chose to stare. It was not surprising, as his brother told him that he was a connoisseur of dishes. But he was never told that his brother had taste buds of 'steel'.

"You should eat before the food gets cold, Kinto."

"Um, yeah," the young boy replied. "Not like it will change much if it gets cold."

=O=

Kinto's POV

That…was…hellish.

Those were the three words that ran through my mind after big brother and I were finished with our meal. It was now time to commence with our plan of action.

Number one, our residence.

We spent the next two hours scouring Miyama for a vacant house to rent. My brother was looking for the traditional, Japanese-style house. I really don't know why bro is looking for something so specific. Couldn't we just find any vacant house to stay in? That's what I asked my brother.

"Because it's a traditional Japanese house."

…I didn't understand anything from my brother's words, and it wasn't something I was supposed to care about apparently. I'll just settle with brother's decision.

To be honest, though, I do feel a little frustrated. Once again, I'll be on the sidelines while brother fights the Heartless. If there was one thing I wish I could have, it was to experience a true fight. But I didn't have enough training in a mortal body to fight against a Heartless. Brother fought in his form for maybe millennia. As a child, all he can do now is to hang around like a normal kid. Go to school. Play in the park. Yadda yadda yadda.

I just want at least "one" chance to genuinely fight an enemy. It's a different sensation than sparring in a dojo, fighting off bullies, or hunting food. And, hey, I'm sure I'm capable of fighting extremely well. My speed can rival a pro Olympic athlete, and I can break bricks with my strength. But 'still not good enough' says brother, and 'it's too dangerous' and 'maybe when you grow older'.

Brother cares for me, but he should realize that I'm able to protect myself.

"Hey, little brother, what do you think of this house?"

"What hou-whoa…"

In front of me there stood a stone wall with a large wooden door in the front. Over the wall, I could make out rather large housing complex. It looked like this house hasn't used in decades based on how worn down the gate looked.

"Bro…isn't this house a bit too old?"

"Sure, it can use a little tidying, but it will pass the time on our stay."

"…In that case, let's take it!"

"Then it's settled! But…who can we go to for the rent?"

=O=

3rd POV

"Well, I have both pleasant news and bad news. Which one would you like to hear first, little brother?" asked Heiwa.

"…Um, pleasant news?"

The two were hanging out at the Central Park in Shinto…if it can be called a park. It was strangely devoid of people for some reason, and the atmosphere in the area felt unnerving. Upon entering this park, Kinto felt as if the outside world had been completely cut off. It was as if this park was a world of its own. He asked his brother if he felt anything suspicious about this park, but Heiwa replied that there was nothing to worry about. It was only his imagination and nothing more. Besides, it seems to be a better place for discussion since there were no people around.

"OK, here's the good news. I have managed to look up the owner of the estate we found," Heiwa explained, "His name is Emiya Kiritsugu. There was not much background information on the man."

"…"

"…"

"…That's all the good news?" Kinto asked incredulously.

Heiwa nodded his head in reply.

"…I'm not looking forward to the bad news."

"Should I refrain from telling you?"

"No, go on."

"Very well. First, the estate is not available for rent. Second, the whereabouts of Emiya Kiritsugu are practically unknown. He has been gone for approximately nine years and is still missing."

"Well that's a downer!" exclaimed Kinto in exasperation, "So what now?"

"Luckily, I managed to find another house that we can rent," replied Heiwa, "Although it appears to a style found in the west."

"You mean Europe or the U.S?"

"That's right. Do you want to take a look?"

=O=

It has been several hours since they finished the negotiations about rental fees and whatnot. Kinto had been lying down on a bed on the second floor. He was bored out of his mind. If there was only something interesting he could…

The house they bought was a small, quaint two-story building made of wood. It had all the necessities the needed for a living. A decent kitchen, beds, etc.

"…Guess, I'll patrol."

With nothing else to do and his brother away in Shinto, Kinto hopped off the bed and through the open window. Luckily, there was no one around to look. Besides, he could easily handle a jump down from two stories.

Meanwhile, on top of the Central Building in Shinto, Heiwa was at work drawing a teleportation seal. The skyscraper was still under construction, so it was unlikely that many would come up here.

"Just finish drawing the pentagram…characters…and there."

Heiwa stood up and took several steps back to gaze upon his work. It was 100 square foot in area, covering a good section of the roof. The seal was designed to teleport him right to this spot when he utters the following words.

Clad in the trinity of powers, soaring through the distant heavens

Bring thyself from point to point.

Distance traversed and world crossed!

The seal began to glow along with Heiwa as he vanished in a burst of light and reappeared in the direct center of the circle.

"It appears to be working successfully. Now I have to simply draw another circle somewhere in Miyama."

But his muttering was interrupted by portals of darkness appearing everywhere. Heiwa summoned forth his signature Keyblade, Beyond the Truth. Transparent in appearance with an outline barely discernable, it is a one-of-a-kind Keyblade.

"It seems like they arrived."

Multiple Neo-Shadows began jumping out of the darkness, ready to devour the hearts of people. But as soon as they laid their eyes upon the Keyblade, their target has switched to the man present on the roof.

"I guess I'm lucky that there aren't much people around."

A Neo Shadow popped up from behind him and leapt at Heiwa with its claws outstretched.

It took only one fast slash to cut that Heartless behind him in half. It faded away in darkness. Heiwa whirled his Keyblade above his head with one hand as he beckoned the rest of the creatures.

"Bring it…"


T12UR: And that's the end of this chapter. If you're wondering why I haven't uploaded "Fate/Zero: Visions, Shattered and Restored", it's because I just lacked motivation to continue it. Simple as that. But if you want me to still continue it, just post several reviews on that story saying so. I'll just leave it up there for people to read. Well…later!