Disclaimer: I do not own Fate/stay Night or RWBY

Author'sNote: RWBY is one of my favorite shows and I have had this idea for quite a while. Since I have other ideas for crossovers between RWBY and Fate/Stay Night, I might write them one day. Hope you guys enjoy my story; critiques and likes are always welcome

Chapter One

Willow Schnee could only run as fast as she could.

Away from the chaos erupting behind her.

Away from the screams and the clashing of weapons behind her.

What was supposed to be a simple charity event became a full nightmare with the attack of the White Fang. It happened all so quickly. One moment the people were enjoying the party, the next the walls shook with explosions as they started to crumble and debris fell from the celling. People panicked and all of them ran to the door for escape.

Then started the real nightmare as the members of the White Fang, who were waiting at the hallway, started killing the guests who were trying to flee. Blood splattered everywhere and the screams of people could be heard, causing pandemonium amongst the guests. With everything happening so fast and people started to running left and right, she had gotten separated from General Ironwood whom she had been talking with. Hence she was running along the corridors all by herself, trying desperately to find her second daughter who should be waiting with a maid in the room where she had left her.

With the charity event droning on for her precious little girl getting tired, she had let Weiss leave the ballroom and get some rest, even though Jacques demanding that she stay, saying that she had to uphold the image of a Schnee. But with the situation that she was in right now, she couldn't help but chastise herself for leaving Weiss out of sight.

If something happened to her…she couldn't bear the thought of her precious snowflake getting hurt. Therefore she ran. Faster than she had ever ran in her life. She had to get to her daughter before the monsters did.

She had to.

Tossing off those high heels she was wearing, she hurriedly climbed the stairs to the floor she had left her daughter. Her first daughter Winter would be safe, as she had seen amongst the chaos that she was next to her father, who was being helped by the General.

Her legs felt like lead, with the constant running she had done inside the large mansion. She could see the doors of the room where she had left her daughter and-

Bang!

"Weiss!"

-opened the door with all her might to see her child safe in the hands of the maid she had left with. Both of them looked terrified but otherwise safe. Willow sank down on her knees, all the worry and tension leaving her as she saw daughter safe.

"Mrs. Schnee!" The maid said, rushing toward her to pull Willow up on her feet. "Thank god you're here. What is going on outside? We heard the sounds of exploding then the mansion shook and then-"

"The White Fang attacked Maria," Willow replied, checking her daughter for any signs of injury. She could see Weiss was trembling out of fear and it killed her to see her daughter afraid and confused. She gently wiped the tears forming in her daughter's eyes running her hands smoothly down her back to calm her.

"It's okay Weiss. Mommy's here for you."

"Mo..mommy? What's going on? Where's daddy? Where's Winter? Are they safe? Are you hurt mommy?" Wiess grabbed the hem of her mother's dress with her tiny hands, shaking like a leaf in the cold, winter wind. Although she had heard of the White Fang in passage, as the stories of board members vanishing could be heard in shushed whispers and her father made his unpleasantness well known, she had never experienced herself what they could do until now.

"Your father and Winter is safe, Weiss. General Ironwood was there with them. We need to get out of here right now. The sooner we do the safer we-"

"Well well well…would you look at that." A chilling voice echoed behind her. Willow whirled around, pushing Weiss behind her to hide her from the intruder.

There stood a group of faunus, each of them holding a range of weapons in their hands. Each of them was wearing black trousers made from rough materials and white vests and a sleeveless shirt inside. Or at least, a vest that used to be white. The pristine white cloth was covered with sprays of blood, fresh from the people they had killed mercilessly. The masks that they were wearing had also droplets of blood sprayed on them, glistening from the light that came out from the room. The dark corridors behind them gave them a more evil look, sneers plastered on them as they looked at the three helpless women in front of them.

"Looks like we found ourselves lucky," the one on the left cackled, enjoying the terrified looks of the maid, who was trembling and crawling backwards to get away from them, fear clearly etched in her eyes.

"Yeah, nice job jackel, spotting the Schnee." The Faunus at the back clapped his comrade on the back, sniffing the air as he did so. "Man I love this smell. This scent of fear that one knows that they are about to be killed," the man said sporting a grin which showed his sharp fangs, "Are you afraid, ladies?"

"To think that we would be able to kill not only one but two Schnees…A chance like this to get rid of you scums are rarely given. Best if we enjoy it right lads?" The one in the middle howled, with the others barking alongside. She was a wolf faunus, her grey ears twitching to every sound that was heard and her tail twitching with glee. She held a black katana in her hand, blood still dripping from the twisted blade. The sound of blood hitting against the granite floor was drowned out by the sick laughter of the crowd gathered before the three terrified ladies.

"Why are you doing this to us let us go!" Weiss shouted angrily from behind her mother. Her eyes welled up in tears, shown with anger and defiance at them. "Let us go, or General Ironwood would hunt you all down!"

The members of the White Fang all looked at the little Schnee incredulously, trying to grasp the situation that this little girl was threatening her.

"Heh..heh..ha ha ha ha HAHAHAHAHA!"

It was unclear who had started to laugh at first. Soon they were all starting to howl like wild animals, doubling over as if they had just heard something amusing. Willow and the maid could only tense, as they tried to get further away from the group of terrorists.

"Ah…that was hilarious…do you want to know why, little Schnee?" The wolf faunus asked, as she began to step closer to the group. The others followed behind, like a pack following its leader for a hunt.

"You see your father, is a very," she took a step closer. "Very," she took another, stepping into the room, illuminating her features more closely. "Very bad person. So we came here to get rid of the vile thing. And also, his family to boot."

"After all," she said, shifting the katana so it would reflect the terrified look of the maid,

"All Schnees are scum."

Then she stroke, and screams echoed in the room

*(Scene Break)*

Willow did not know how long time had passed. An hour? A minute? All she knew that she was slowly tiring out, unable to hold the Glyphs that she had made as a barricade between the White Fang and her daughter and herself. It was already starting to phase out, with the constant damage it was getting and her aura depleting fast. She had to find a way to escape. She had to, otherwise…

She looked at the lifeless eyes of the maid who was sprawled on the floor with a deep gash on her chest. She had been the first to go, with no Aura to protect her and the fact she had jumped in front of Willow to protect her from a strike that would have obviously cut her head off.

Sweat glistened on her forehead as she pushed all her power in maintaining the barrier that would mean life and death. She drew deep ragged breath, as she looked at the White Fang who was smashing their weapons at the snow white glyphs in front of them. The sound of clashing weapons vibrated against the walls.

She could not give up. For the sake of her daughter who was crying and trembling behind her in fear, she could not give up. She would not-

"That's enough. Step aside boys."

With the word of the wolf faunus, who seemed to be the leader of the group, all stepped back, clearing the war for her. She touched the glyph in front of her, examining it closely.

"A Schnee is a Schnee, huh? What an annoying semblance they have…oh well"

She hefted the katana above her head preparing to strike it down with all her might. Black energy covered the blade, swirling around it as if the blade had been coated in flames.

"That does not change the fact…That you are gonna die here you BITCH!"

She swung the sword down, and the glyph was cut in half, vanishing into the air in a shimmer of dusts. Willow could only stare at shock, not understanding what had happened. How did she…

"You seemed surprised Schnee. Since your about to die, let me tell you a little secret. My semblance is the ability to cut through anything. Although cutting something big and powerful requires time to charge. Like your annoying little glyphs here." She smiled enjoying the dawning look that she Schnee in front of her had. "And it seems like you've also ran out of Aura," looking at Willow who tried to form another glyphs in front of her, only for it to flicker and fade like a dying candle.

"Well then, goodbye Schnee. May you rot, in hell"

Willow could tell that this was the end. Her plan for holding out with her semblance had failed, with the White Fang member in front of her depleting her Aura. She was okay with her dying. But her precious little snowflake…

She turned to Weiss who had tears running down her light blue eyes, glistening in the light. She smiled at her, trying to sooth her down but failing herself as tears ran down her cheeks too. Such beautiful eyes, her daughter had. It was a pity she would see it for the last time. A pity she would not be able to see her grow up into a beautiful woman as she would, enjoying her life as she wished. She knew she would succeed in whatever she would do. Her daughter was brilliant. Of course she would succeed. A pity, that she would no longer be able to her family. Winter, Whitely, Jacques.

A pity indeed it was.

"Weiss, I lo-"

Pain coursed through her as the tip of a blade pierced through her chest. Blood splattered against the pristine walls and curtain, staining them with red. She had never felt pain like this ever. Every breath she took hurt, as her lung had been punctured, filling it with blood and making it difficult to breathe. Every movement was torture and it was if her nerves were on fire. She looked down at Weiss, where drops of blood had been sprayed on her face. With watering eyes, she tried to comfort her, wanting to say that it was okay.

Then the sword was drawn back and she fell to the floor on her side, blood pouring out from her wound.

"NOOOOOO! MOOOMMMMYYYYY!

The other White Fang members laughed at the sight of the death of a Schnee and the misery of the poor girl.

"You monster…you monster!" Weiss ran up to punch the Faunus, only to be kicked back against the wall, the sound causing more laughter from the group.

"Look at the girl! She's got spirit!" One howled falling onto his knees and hitting the floor as he laughed

'No…Weiss…no…"

Willow couldn't help but cry as she watched her daughter suffer in the hands of those madmen. She was angry. Angry at the fact that no one had turn up until now. Angry at the fact that the White Fang had attacked. But mostly, angry at herself who couldn't do anything to help protect her daughter.

'Please…if anyone is listening…please…save my daughter…please…"

Unbeknownst to her, her blood had landed on an old tome, which she had given her daughter to read while she had left her daughter with her maid, the blood sinking into the pages. An old tome she had bought from a mysterious old man who had silver hair and beard, with blood red eyes giving a mysterious aura.

The gears of fate started to move. The unseeing hands that wound and set the realities of the world, working to rewrite what would have originally happen.

And as if her prayers had been answered, an ethereal light basked the room in its radiance, blinding the occupants with its majestic light, as archaic seals flashed and symbols shaped in the air.

Then as the light faded, there was a man, who had definitely not existed before, standing proud and straight, giving an aura that was beyond human.

*(Scene Break)*

Shirou Emiya looked around the room that he had been summoned. It was not his first time he had been involved in a supernatural event. Nor was it his first time being involved in a summoning ritual, as he had participated, although unwillingly, as a Master in an event that happened in his hometown. It was his first however to be the one summoned. Okay so maybe he had been summoned before, but that was not him but another version of him, so that didn't count. So he could definitely say that it was his first time being summoned.

And he knew that his summoning was not an ordinary case.

First of all, the information that he should have gotten from the Holy Grail upon his summoning, was lacking. From the moment he was summoned, the Grail should have at least provided with enough information about the current era for him to get a better understanding of his situation. But it did not. Meaning that this, was not a normal Holy Grail War.

Second, the people in front of him were not exactly…human. Shirou couldn't help but raise an eyebrow at some of the members who animal ears and, was that a tail moving behind that woman?

He started to analyze the situation that he had been summoned. The first that he noticed were the bodies on the floor. A maid, and a fancy dressed woman with her white hair dressed in a bun. He could tell that the maid was dead, and the woman was alive, although just barely. Then he spotted the little girl beside the wall, coughing as if she had been kicked in the stomach. Then there were the strange people with animalistic traits in them. There was a total six of them. Each dressed in the same outfit with blood smeared on them.

Then he looked at the weapons they were holding.

What he found disgusted him. The blades held by those terrorists had taken countless of innocent lives, every murder etched on them like a crime report, each getting worse as he structural grasped them.

He turned away for the time being as he had other matters to deal with. But they would pay for what they had done. Oh they would pay. He would make sure of that none would escape, alive.

*(Scene Break)*

Louve couldn't understand what had just happened. After she had stabbed the Schnee and kicked the little Schnee in the stomach, making her fly away – oh wasn't that satisfying – a flash of light erupted in the middle of the room and suddenly a man had appeared. He was tall. Six-feet tall with red colored hair and bronze colored orbs that screamed power when she had looked at them.

But what was strange was his attire. He was draped in a white cloak with strange designs decorating the inside. He had no shirt on and Louve couldn't deny that the man in front of him had a body worth ogling, with a toned chest and not a single fat on them. He had a red igote with black markings over his left arm. Black pants were tied together by a white belt and a small utility pouch was over his left thigh. His legs were protected by armored straps and wore sandals instead of shoes.

He seemed to look around the room, analyzing the place he was. His gaze swept over the fallen people and landed on her. And that was when her instincts screamed at her. He was dangerous. For some reason, all her senses were screaming at her to run. To run away from the man or otherwise there would be only death. She gulped at the bronze colored eyes bore down at her, then at her weapon. She needed to run she needed to-

He then turned away and started to walk towards the Schnee.

"Are you okay?" Shirou asked, checking for any injuries the girl might have suffered. Thankfully the girl seemed fine, otherwise being in a state of shock.

"Mo..mommy…" The girl wimpered, looking at the fallen woman who looked almost identical to the girl in front of him.

He turned his attention to the woman, who was looking at him with almost lifeless eyes. He could sense that she was the one who had summoned him. That she was his Master. That she was the one to utilize an ancient magic, in desperateness to save her child. He knew that he could not do anything to save her, with her using almost all of her life force to perform a miracle.

Another person he could not save. But he could save her child, as the last wish his Master had wanted.

"What is your name?" Shirou asked with a smile to ease the scared girl.

"W..Weiss."

"Weiss, huh? As in white," He looked at the girl, and wiped the blood clean off her face. Blood did not suit a child. "Listen Weiss, could you do me a favor?"

"Hey! Who are you and what the fu-"

"Shut up." Shirou said, leaking a large amount of prana from him, effectively shutting the White Fangs up. A sense of clod wave washed over them, making their hair some literally stand up on edge. Their instincts had kicked in, sensing the danger that was in a shape of the man in front of him.

"Could you look after your mommy while I handle he bad guys over there? I'll be quick okay?"

Weiss bravely nodded at him, and Shirou couldn't help but smile even in the dire situation they were in.

"Good girl," said Shirou, patting her head and rising from where he had crouched.

"Oh, and Weiss?"

Weiss looked at the broad back of the man who had arrived. His back seemed to be shielding her from the danger in front of him, like a protector. For some reason she felt safe behind him.

The hammer of a pistol was pulled back and fired in his mind as neon coloured interface patterns flashed across his body. Flames seemed to dance in the air as he pulled a sword from thin air. It was as if he was pulling the sword from the left hand he was holding his cloak, the flames swirling around the sword, following it as it was pulled. First came the hilt covered in silk, woven so it would make diamond patterns alongside it. Then came the blade, steaming like it had been just forged and brought into the realms of men.

Shirou held the katana he had just forged, shifting his feet to prepare for a fight.

"Don't look up."

*(Scene Break)*

Louve could only stare at the man no a monster she corrected herself as she could only tremble in fear as he approached her. Was this what could be a case where the hunter became the hunted?

It happened all so fast. One moment he was there standing with the tip of his sword pointed down towards the ground, the next he was gone, only to appear in front of Borges with his chest slashed open. He fell, blood splattering against the ground, as he was killed without even knowing how he had died. It took a few seconds for the others to realize that Aura did not protect him, and another one of her fellow members had been killed during that brief pause.

The others tried to block or attack but he was to fast or strong for them. A single downward strike was able to bring Orca, a killer whale faunus who was known for his strength, to his knees as he bucked from the power the man had put in it. He was soon out of the fight by a solid kick that lifted him a few feet of the ground and was sent through the wall. The others met the same end as the fallen. They were no match for him. The difference in power was like the difference between an ant and a man. The level of skills he possessed in sword fighting dwarfed them all. She could do nothing. Nothing to stop her from the grasps of death that would surely catch up with her.

"Please…no…I..no…don't..please…"

Shirou ignored her pleadings as his eyes burned like an inferno, blazing hot with fury. He stood in front of her, looking down as if to judge a sinner for a crime one had done.

"Did you show mercy to the ones you had cut down with your own hands?" he asked, knowing the answer would be no.

That was the moment when Louve saw movement behind the monster. It was Orca, who seemed to have regained conscious after he had been sent through the wall with just a kick. And it seemed like the monster in front of her had not noticed him. If only she could hold his attention until Orca could land a devastating blow on him then…

"Please! We are actually just victims, victims of the horrendous crimes the world had done to us!" Just a bit longer and…"The Schnee are the worst to our kind! They treat us like slaves! We had no choice but to do such things!" She could see him lifting his favored weapon, a giant mace with spikes all over them, to deliver a crushing sneak attack. He swung down-

Gotcha!

-Blood splattered as Orca looked down at the clean cut on his stomach, his objective behind him, flicking his sword with an impassive look to clean the blood spilled upon the blade. He fell, the sound echoing against the dark hallway.

Shriou turned back to Louve, who was now definitely trying to escape, only to have her back pressed against the wall. He had vowed not to let them out alive. And he was going to do so.

"It seems like the conviction you were willing to kill for weren't enough to die for." Shirou scowled at the faunus in front of him,

"How contemptible."

A scream. A sound of a blade being swun, and the dark corridors once again became silent.

*(Scene Break)*

"Tha…thank you." Willow wheezed, too tired to talk and thank properly the savior that appeared out of nowhere. Wherever he came from, she was glad that he did, for her daughter was safe for now.

Shirou could only give a brief nod, as he sat down next to his master. He knew time was short and with the death of her, would soon vanish back into the Throne of Heroes.

"Please…protect…my daughter…Protect her…in my place will…you?"

She knew it was too much to ask for a complete stranger. Even though the man in front of her was someone who had protected her daughter, the fact did not change that they had just met, and he was a man who she did not know. She did not know where did he come from or who he was, or his intention for saving them. But somehow, somehow, she got the feeling that she could trust him. That he would walk the very path of hell to protect her.

"…Yes master, if that is you wish. I shall be her sword and shield." He knew it was a promise he might not be able to keep. After all, he would vanish from the plains of existence with her death.

But he could not say no.

Then she smiled, and it reminded him of Kiritsugu, when he had been saved from the hellish flames that had reborn him into whom he was now. It reminded him of the smile that he had when he had dug Shirou out from the debris. The smile that gave him the dream that he so sought after.

It was a smile of a person who had just been saved.

With all her strength left in her, Willow raised a hand to wipe the tears of her daughter's face.

"…I…love…you…Weiss."

Then she fell into eternal sleep.

Weiss looked down at her mother's lifeless body, not believing what had just happened. She slowly held the hand that had just caressed her face, and let the tears drop in earnest.

"N..no..mommy, please…don't leave me…no…"

Shirou could only watch as the child hiccupped and cried lying beside her mother's body. A mother, who had risked everything, even her own life to save the daughter she had loved. And now it was his job to protect the small child in grief, form the dangers of this unknown world that this place might have.

He gently closed the lifeless eyes of his Master, hoping she would find peace.

Such a sad day it was

So how was it? Did you guys enjoy it? The Shirou for this story is modeled after the 5 Star Craft Essence, 'Limited / Zero Over'. Therefore he would look like Senji Muramasa from FateGrandOrder, a legendary blacksmith who was summoned as a Pseudo-Servant in the body of Shirou Emiya. So instead of using Kanshou an Bakuya like most versions of Emiya, he will most likely use a katana. The mystery behind it will be revealed later on as the story goes.

FunFacts about the name of the White Fang Memebrs . Jackel is a 'Jackal' Faunus, hence his name. Louve means 'wolf' in French, and Orca is another word for 'killer whale'