Chapter 1 The Ruler as arrived

Fourth Holy Grail War Act (Fate/Zero)

Within Grail has two beings, one light and other darkness. To things that can't live without they other and soon saw their most trusted servant coming forward before them. The Ruler Class Servant stand before the Grail and its ones that live within it.

"You have summoned me," Ruler said as he took knee, being male and covered by a black cloak.

Justeaze Lizrich von Einzbern, the light within Grail said, "Yes we have Ruler. Something is happening within the Fourth Holy Grail War that requires your attention to watch and protect the Grail from any sinner's hands or to wish harm to mankind."

"I understand my mission, Justeaze," Ruler said with a nod, understanding his mission.

"Yes, but know that this Grail War will be different from one you fought in. Seven Masters and their Servants will fight for the Grail while a watcher will make sure the Grail War plays out right," The darkness said, being a female and named, Angra Mainyu.

"I see. So, no Demi-Servants fighting a war but just Mages and their Servants. That's understandable and I will make no one is harm from the Grail War," Ruler said.

"Go…and be safe Naruto," Justeaze said with a kind smile on her face.

The Ruler or Naruto took his hood off to show his smile at the Grail's light. This was Naruto Charlemagne Uzumaki, Holy Knight of the Veil, Hero of Hope, and rank a Saber-Ruler Class Servant. His hair was black as night with white under streaks and six-pointed star on top his head. His eyes were blue as the sea and his face show the looks of a noble knight with whisker marks on his checks. The black cloak hides his armor for now and will show it in time.

"I will Justeaze, Angra," Naruto replied as a magic circle comes underneath him, teleporting him to War Grail he must watch over and disappeared within a white flash of energy.

Fuyuki, Japan

Naruto open his eyes to see he was teleported just outside Fuyuki City and could feel that Grail was starting soon as the Servants will be summoned by their master's call.

"Good, I am on time," Naruto thought with a nod, getting up from his kneed to his feet and summon some cloths as a cover up.

The black cloak disappeared in blue dust of energy as set cloths appeared onto Naruto and was dressed as normal civilian. He now wore a blue shirt with black jacket, pants, shoes, and a red scarf around his neck. He checked his hand watch to see the time was midnight and will need to find a place to rest until the rest of the Mages and their Servants arrived in Fuyuki.

Naruto won't know what hero will be summon this Grail War until he sees them and judged if they should gain their wish from the Grail to the very end. Anything can happen in a Grail but from he knows and live through, that Saber Class Servants are the mostly like to win the Grail War. But anything can happen and who knows who will win but he can only find out for himself.

Time Skip

As Naruto wonders Fuyuki, getting a read off the whole city that will soon have the Grail War take places and where he must do his job. He walked around, visiting good shops, talking to people of any strange things, or anything that catches his eye.

The black-haired teen heard from some parents that they lost their children to a monster and caused him to raise an eyebrow at this, wondering who could have done this. He promised that he will do his best to find any of the children that are missing and gained some tearful pairs to cry in happiness.

Naruto took his time wondering the city, because he wanted to enjoy this quiet of peace before the war starts. Back in his world, the Veil, he would walk around for hours and talk to someone to pass the time. It helps a lot and he just so happen to find a pair to talk with.

Two young women. One with white hair and red ruby eyes, wearing some white winter gear and made the teen to almost know her from somewhere. The other had blonde hair and green eyes, wearing a black business suit, shoes, and look beautiful.

Naruto shook his head, fighting off the blush and soon got a reading on the blonde-haired woman. Being said as his eyes shin a bit:

Rank: Saber

True Name: Artoria Pendragon, King of Knights

"Hmm so the King of Knights has been summoned in this Grail War. That is interesting," Naruto thought with the eyes returning to normal and started to walk towards the pair.

"Hello, their," Naruto greeted the pair, getting their attention to look at him.

Irisviel von Einzbern and Saber were taken back of someone greeting them, being a normal human being and not any Mages or Servants. That was good but wonder who is this teen that greeted them.

"Hello sir," Irisviel greeted.

"Greetings," Saber greeted as well.

"Sorry if I ask this… but are you two willing to walk with me into town for some lunch and good talk around to the beach?" Naruto asked.

"Why?" Irisviel asked the sudden question.

"Don't think of anything bad, I just happen to show in Fuyuki and feel very lonely on my own. I happen to like to talk to someone when going out for lunch and talk afterwards," Naruto answered, truthy.

Irisviel didn't see no harm in that and a good lunch could help ease somethings down before the war starts. Saber was worried of this person that just asked them for lunch and talk but a good meal could help calm things down and this strange look like noble from her time era.

The two looked each other which gain a nod that it was okay to other and white-haired woman said, "Very well, we will join for lunch, but I think we should introduce ourselves."

"Quite right. My name is Naruto Kit," Naruto introduced himself.

"My name Irisviel but please call me Iri and this is Saber," Irisviel introduced herself and Saber.

"It's nice to meet you Naruto," Saber said with a calm smile.

"And you as well. Now let's head out for lunch, my treat," Naruto said as the group of three walks towards a nice place for some lunch.

Time Skip

The group of three had enjoyed their talk with the other and walked around town. Going to different shops to try on different style cloths, walking through parks, and eating some food. They walk soon made it way towards night time and at the beach.

Naruto had part ways with Irisviel and Saber, saying it was great time to hang out with them and hope they can do so again. He was happy he could talk to the King of Knights and hope the two could two more. For some reason, he felt at peace when around her, something he never felt before in a long time and wish for that feeling to stay with him.

But anything can happen, and something has happened.

Naruto then started to sense a Servant sending a calling card to other Servants for a fight. He can't say who called the battle, but he knows for a fact that Saber would join in for sure and he knows how knights love to fight a in honorable battle against each other.

The Ruler will go and see how this first battle of the Fourth Grail War takes place. He then has his clothes disappeared in blue dust of energy, replacing them with his knight outfit and black cloak covering him.

As Ruler dashed towards the area where the first battle will take place, he started to feel that three servants were falling him all the sudden in their spirit forms. The first was a golden and divine aura with kingship following it, being unknow for now. The second was a hidden and dark aura with some assassin tricks, meaning an Assassin Class Servant. The last was very dark, fire, and witch like aura but wasn't to cause harm and just watch him.

Naruto will find out soon enough but most focus on the matter at hand as he saw a vision coming to him.

…

A Saber and Lancer fight one another but is stopped when Rider comes and soon Archer then Berserker show up. Being the first sign of the Grail War too start.

…

Naruto hummed and trusted this vision he had gain as he kept going to the docks where the first fight will take place. These visions he gains are part of his skill as a Ruler and helps him be ready for any outcome that may happen. He had vision of the first battle will take place and the outcome will lead to future battles that will take place in this Grail War. So that why he is here, to make sure the peace is draw and no people get in the crossfire.

Small Time Skip

Naruto watched the battle between the two knight class servants and was enjoying on how the first battle was having two knights from different class. He senses the other Servants were watching this fight and with some Mages in the shadows, most likely their go to in Grail Wars these days.

The Ruler then saw Assassin from above, watching the battle take place and narrowed his eyes on what he had gather so far on what happen in the Grail. He read who the Assassin was and got:

Rank: Assassin

True Name: Hassan, Old Man of the Mountain

Naruto know all about that Assassin due to deep a history he had with someone that hold and was bound with the skull masked assassin but moving on.

The blonde had learned that the Master of Assassin lost his servant and is now in a church for portion. If that is case than why Assassin is around and what is his master's game? A good question that the black-haired teen will find soon enough.

Naruto won't fight but will step in if things get out of hand. As a Ruler, he must watch the Grail War to the very end, make sure the Grail is not used by any sinner ways, or have any civilians get got in the crossfire. This was a new change for him as he fought in one Grail War in his world and won but lost some of the people he cares about the most.

Ruler shook his head and heard a lighting strike in the skies which was odd due the clouds were calm and could sense a Servant coming into the battle. Now he got to see this up close as he jumped to another shipment and got a closer work.

With Saber

Saber had fought many foes in her life but she than image she will face Lancer or by true name Diarmuid, that rivals her in both combat and honor. She was grateful for this fight and fought with careful steps, but she gained a cursed wound on her left-hand risk and can't use her thrum to clench onto her sword or hold the sword in both hands for long.

The two knights were about to clash one more but were stopped when a lighting bolt strikes before them and show the servant before them. The new servant was a young mature woman with long red flowing hair that reaches to her mind back, dark red eyes that spark with happiness, and wore a battle armor from Roman or Greek time of area with a red cape with golden fur. She rode chariot that can carried herself and her master. The chariot was pulled by two black massive ox-like horse having their huffs spark with lightning.

"Sheath your blades my fellow Servants!" The Servant called out as she held rings of her chariot, getting the two servants look at her.

Lighting sparks as the servant put her hands out and said, "I'm the Rider Class Servant, summon to fight in this Grail War."

Saber and Lancer were taken back of Rider appearing all the sudden introduce herself.

"What are you doing, baka?!" Rider's master or Waver Velvet shouted at his servant on what she was doing and will do soon enough.

However, he was reward with flick to the forehead by Rider and launched backwards into the chariot. Rider shook her head and then grin as she turns her back towards the two knight servants.

"Fate has yield and reward us of this moment. I have an offer…why not give the Holy Grail to me and join me on my next conquest?! You both will be honored as friends, generals in my army, and siblings on both on or off the battle field!" Rider offered with a big grin on her face.

The offer was great but sadly the two servants won't being joining Rider.

Lancer shook his head and said, "As grateful the offer maybe but I must refuse. I only follow one man, my lord and master. I won't be giving the Grail up easily to the likes of you, Rider."

"Tell me Rider, do you come here to stop our battle with offers, rudely, hopping to gain something from it. This a gave wound to my honor," Saber said with her eyes narrowed.

Rider starched her cheeks and said, "I hope we can come to common…."

"Enough!" The two servants called out.

Rider shrugged her shoulders and stroke her long hair with her left hand.

"And furthermore, I am the rightful King of Britain. To put my loyalties to you will go against what I stand for," Saber said, not caring if she gives her true name out.

"Oh, you are King of Britain? I'm surprise to see a strong woman that is king like myself," Rider said with a smirk as she placed her hands on her hips.

"King?" Saber asked with an eyebrow raised, wondering what king Rider was in her past life.

Lancer wonder the same thing and some other masters did as well.

"Yes, but first. Saber and Lancer your battle was a true and honor battle that puts a song into my heart," Rider said with her right thrum up.

Now Saber was wondering why Rider would jump into battle to only offer a pack and later thank it. This was an odd servant to say.

"Your battle has called other Heroic Spirits to this place like moths to a flame….and that makes it more fun for me. Come out cowards that hide in shadows and face the wrath of Alexandria, King of Conquerors!" Rider shouted out loud with pride in her voice, not caring if she gives away her true name and caused her master to yell at her for being idiot.

This was a mind shocking news to the Servants in front/others in hiding and master of Rider giving her true name out. This woman was the king that conquer the know worlds. This person was Iskandar or Alexander the Great. It was a shocking news to find it the King of Conquerors was indeed in fact a woman, standing before them. She and Saber have some things common after all.

And a big battle was soon taking place.

As if on time, another Servant started to appear out of spirit form and stand before all them on a light pole. Within a gold dust, a servant appeared that has a powerful and divine aura. A beautiful woman with waist-length golden hair, crimson eyes with black slits, pale skin, and a slender body that any women that will to die for. She was wearing a modified golden armor, with shoulder pauldrons and gauntlet on one arm, with an armored skirt as she wore a pair of black short shorts that showed off her very nice behind and armored greaves from her thighs down. She was wearing golden boots with slight heels as she wore high-thigh black socks that came up to her mid-thighs. She had a cloak that had a black top that only covered her shoulders and the top half of her breast, stopping just under her nipples, with the main portion of the cloak being a crimson red as she had red tattoos on the sides of her stomach and breast as she has the looks of pure royalty and DEMANDS respect from her.

Some of other servants and masters known this servant was Archer, one who killed Assassin (cough, false, cough). She opens her eyes with glare, looking down on the three servants like they were ants to her.

"So lower beings stand before me and even two of them call themselves king in my sight," Archer said with disliking in her voice.

"I don't see the problem here, Archer. For I am Alexandra, the King that conquer the know parts of the world," Rider said with questionable look on her face as she starches her cheeks, wondering why Archer was so upset about this.

"Fool, I am the one true king of the world."

"If that is a problem then why not introduce yourself? A king like yourself like should not a have problem with in saying her name."

"So, you dare question me, filth mongrel. ME…the one true King!" Archer snapped as she stepped on the light pole, breaking the light.

Archer then looked at the servants, mostly Rider and Saber, and said, "For your blindness to not see a true king standing before you. The punishment will be your doom!"

Two golden circle appeared by the servant's side, rippling as two swords came out and aiming at the fool. Archer smirked as her weapons pointed at Rider, but this was stopped when something happens.

"Kill them all," A voice said in the darkness, ordering a new servant to appear before everyone.

A black mana burst outwards as the servant rose up from his knee position. The new servant was odd to make out, but look like a black creature from hell, wore a black armor as night with mist surrounding him, red visor, and feather coming down from his helmet. The black knight servant then rose up on his feet and let out a monster roar for all to here.

"Berserker?" Saber said in shock as she stand in front of Irisviel, keeping safe from harm if anything happens.

"So, King of Conquers are you are planning to ask him to join too?" Lancer asked.

"Maybe not, he doesn't look like the type to listen to reason or offers," Rider answered before looking at her master.

"Hey boy, how powerful is that monster?"

Waver was shaking as he couldn't read Berserker or his states, almost like he wasn't a servant.

"I-I don't know," Waver responded with sweat coming down his face.

"What? You are a master, are you not. You should be apple to read a Servant out, right?" Rider said with questionable look before turning her attention at the black knight.

"I know that it's servant but that black thing. I can't its states or anything else," Waver replied.

Rider narrowed her eyes and looked at Berserker, knowing that this servant was no normal servant but something and will keep her guard up in order to protect her master.

"It seems you will be facing other enemy," Irisviel said, knowing that the battle will get more fired up with five servants.

"So, it seems. Berserker must have some type of skill that hides himself and skills from other servants. And there is Archer…this might get out of hand," Saber said, knowing that she might stand against one or two servants at once but against four, that was another story and with her left hand cursed makes this worse for her and her sup-master.

Archer turn her attention towards the mad-servant, who was looking at her and said, "Who gave you permission to look at me, rabbit dog."

Then golden circle turns towards Berserker, having a new target locked.

"May your death give me some satisfaction, mongrel," Archer said with her arm crossed as the two weapons flew at the servant.

The swords shoot at Berserker with great speed, getting small explosion on impact and caused shock wave. Saber shielded Irisviel but soon her and her sup-master were shock on what happen next. The black stood on his feet undamaged with a sword in his hands, shocking the other as well on what just happen.

"Good god! Is that truly Berserker," Lancer said in shock on what just he saw.

"Hmm, for madman that has no soul or will of his own, he seems sane to me," Rider said as her right hand rested on her chin.

"Huh?" Waver asked, wondering what his servant met.

"What you couldn't tell what he did? He waited for the first blade fly towards to only take in midair and use it to destroy the second spear," Rider answered as she and the other servants saw what happen.

Berserker then looked at Archer, causing the golden-haired servant to be upset.

"You dare lay your filthy on my treasure? You will have quick and painful death, dog!" Archer shouted as twenty more golden circle appeared behind her with different kinds of weapons coming out

This caused the Servants and Mages to widen their eyes in shock on how many weapons where be unleashed before their eyes. Just what kind of Servant Archer was?

"Now then mongrel, let's how long your creep tricks can keep you alive," Archer said before unleashing her Gate's power onto the mad dog in front of her.

Berserker just stood there as the first set of weapons launched at him but grabbed the spear before it hit his chest and started to use the two weapons in his hands to swing at the weapons coming at him. He destroyed any weapons that were coming at before switching to different weapons and not let one of them land onto him.

With a downwards strike, Berserker destroyed a spear with two axes, creating a smoke screen and soon throw the axes towards the golden haired servant.

Archer jumped off the light pole to only land on the ground at ease and had angry look on her face.

"Fool…I belong in the heavens, and yet you have me on the ground! You will die before my feet!" Archer yelled as she summons seventy-five golden circles, shocking everyone on how many she was summoning and not caring of showing the power of her Gates in the open.

Berserker just stood in his place, waiting for round two to start.

But this second round was stopped when a new servant suddenly appeared out of nowhere and before the battle field. The new figure was wearing a black cloak and hood as holding a sword's hilt in it's white sheath. Some at first thought it was Assassin but found out that it wasn't due to a few things and one of them were that this figure had blue eyes.

"Archer, you will stand down before you unleash anymore of your power at this moment," The figure ordered.

Archer glared at the newcomer, but it didn't move him.

"You dare order a king to stand down, mongrel!" Archer snapped as she then aimed five weapons at the new comer.

First five weapons fire at the new comer, but he just stood there and draw out his sword.

Within a flash, the cloak flies off the newcomer as he draws out his sword and swung it downwards, summoning three blue sword keys with a feather hilt and destroyed the blades before it came close to him. (Just look up Fate Extella Charlemagne for what Naruto is wearing)

Irisviel and Saber both grasped in shock on seeing a familiar face and that person was a servant. How could they not see or senses it from the start? Naruto is a Servant, standing before them with a sword in his hands like Saber Class Servant would and what is his Servant's rank?

"I dare as I am the watcher of this Grail War, chosen by the Holy Grail to watcher over the war and make sure the rules are followed. I'm the servant, Ruler," Naruto announced with his key sword vanishing and puts his sword back but not letting his grip off his hilt, just in case.

This news was mind-blowing event to all Servants and some masters. The Ruler Class was one of the sup class servants that could be summoned, and this was one can only be summoned by the Grail itself.

"Ruler? Haha! I'm the true king and ruler of the world. To have some faker is something I can't allow to stand," Archer said, but was stopped when Naruto allowed his Command Spell to show behind him, showing an eagle with blade-like wings and proving his rank as a Ruler Class Servant.

"I am Ruler. I will use my Command Spells to have this fight be stopped…but I won't and will ask you, King of the Golden Rule, to withdraw from his fight," Naruto said as he put his Command Spells away and lower his guard down bit, showing that he will not act.

Archer smirked a little before flicking her right arm, having all the gates close and weapons back to the gate for now. She was somewhat happy that someone knows that she is king to be known by…and her master used a Command Spell to force her to withdraw.

"You are lucky, mad dog, Ruler. Mongrels, in our next meeting be ready for me. Only a true king may own my attention," Archer said as she disappeared back into spirit form.

Rider hummed and said, "It seems Goldie's master is not well minded to her liking."

The conquer known from a look when a Command Spell is used and know that Archer was too prideful to withdraw and leave the fight undone.

Before anything else, Saber heard Berserker grunting towards her and widen eyes when the mad servant unleashing a mana burst with a powerful roar to be heard by all.

"Irisviel get back!" Saber called out.

Berserker dashed towards the light pole, grabbing it into his hands and jumped in the air to swing his pole downwards at the sword wielding servant. Saber pulled her sword up, blocking the attack and soon widen her eyes when seeing something off.

"What?" Saber thought in shock when seeing the pole covered in black mist and red marks mana.

Saber grunted as she pushed the pole away and soon blocked a swing to her right side, having the mad servant backing away.

Naruto narrowed his eyes at Berserker, seeing that he can't read out the servant or know his true name. But he could tell it was a Berserker Class Servant with some mad boosting to be stronger than anything normal servants. That might work but the black-haired ruler wonder about the servant.

"So that what it is. Whatever that things grabs onto, becomes his Noble Phantasm," Rider said with her right hand on her chin, seeing the mad-servant's skill first hand.

Lancer stood quite and was about to jump to stop this fight but was stopped when Ruler put a hand on his shoulder and shook his head. The lancer wielding servant didn't why at first but soon saw the black-haired ruler drawing out his blade and dashed to help Saber.

With a powerful swing of his sword, Naruto cut the light pole in half and kicked Berserker in his gut, sending him backwards. He then summoned a red sword key by his send and fired a power flame burst at the servant. The mad servant shielded himself form the attack as he was pushed backwards with his feet dig into the ground and roared angry at Ruler.

Naruto turn his head back and said, "Are you alright, Saber?"

"I am, but my left thump is yet healed," Saber answered, meaning the curse wound she gained.

"I see. That will make it hard, but I have feeling that we won't have to worry about Berserker for the moment," Naruto said as he turns his attention back towards the mad servant.

Before Saber could spoke or ask why, Rider then snapped the rings of her chariot and let out a loud battle cry as her ox rode with great speed towards her target…Berserker.

The mad servant had little time to move out of way as he was road kill by the massive horses and chariot. Berserker rolled into the ground and grunted in pain of the sudden attack. The black knight rose his head up and soon return to his spirit form by orders of his master and need to heal his wounds.

"It seems that servant is hard one huh?" Rider remarked as she watched the knight vanished.

Within the shadows, Lancer's master was about to use a Command Spell to order his servant to kill Saber or Ruler for him to take the Command Spells.

However, he was stopped when Ruler spoke out, knowing his plans and did not like it.

"Don't even think about Master of Lancer. I won't have you stump over your servant's pride or honor as a knight. Either you leave for the night, if not then I will join Saber and Rider to stop Lancer. And with three us fighting together, we easy destroyed your servant. So, what will it be?" Naruto asked, giving the mage a choose and could sense the anger.

The mage grunted in anger but saw that he will lose and said, "Fine…Lancer, that is enough for tonight."

Lancer lowed his guard and was happy that Ruler stopped his master from doing something that will damage his honor.

"My thanks, Ruler," Lancer said his thanks.

Naruto nodded his head with a small smile on his face, welcoming the thanks and watched Lancer vanishing into his spirit form.

"Rider did you come to only offer an alliance?" Saber asked, wondering if the Rider Servant will attack her now.

"Honestly, I did and was worth a try, but the answer is still the same. Saber you first deal with things with Lancer and then I will face the winner after the battle, being you or Lancer," Rider answered, getting Saber and Ruler happy of her answer.

"Now I must be going and hope I can have more fun like this night. Hey boy, don't you have anything nice to say to the lady and nobleman?"

Rider didn't get an answer from her master and soon pick the body of her master, being overwhelmed and fainted.

"I really wish he man up a little. Oh well," Rider said before turning his attention towards Saber, who smile and nodded her head in thanks.

Rider then snapped the rings, having her chariot being pulled into the air by her horses and flew into the night sky.

Naruto then turn his attention back towards Saber and said, "I'm sorry if I wasn't truthful with you or Irisviel. While I did know you are servant to fight in this Holy Grail, I still had a good time and wish we can still be friends."

Saber was taken back at this sudden apology and Irisviel was too.

The white-haired woman soon walked towards the two and said, "That's fine. I understand your reasons, but I never thought a Ruler will be summon in this Grail War."

"Me neither and I thank you, Naruto for adding me," Saber said.

"You're welcome, Saber, Irisviel. This Grail War will be different from the others while I can't alley myself with other Servants or Masters, but I am willing to work alongside you two to get some answers," Naruto said.

"That's fine and I will go over a few things of what happen," Irisviel said, being a little shaken of the first battle that took place.

Naruto nodded his head in agreement and know that the Grail War has fulling begin.

AN: Cool, right? And yes, Naruto fought in a Grail War in his world as a Saber, being like the war that Shirou fought in as an Archer, you know the one. And someone can write that Grail War as a prequel to this story. Just ask me if you want to write it. Also, Naruto will be the Ruler in the Fourth and later the Fifth Holy Grail with a big maybe to the Great Holy Grail War. I will see you all later.

Naruto's Infor

Naruto Uzumaki (Bounded with Charlemagne to become a Demi-Servant like Mashu and has all the Saber Class Skills and some of the Ruler Class Skills)

Noble Phantasm:

Joyuse.

Joyuse Ordre: Exemplify the Heroic King, O' Twelve Radiant Swords That Travels the Wide World.

Charles Patricius: Our Transient Glory

ANN: Also Naruto is not OP that no Servants can match just because he is a Saber-Ruler Servant. There are some Servants that can match like Gil-chan.

Naruto's Harem:

Fourth Holy Grail: Artoria Pendragon. Female Gilgamesh. Female Enkidu. Alexandria (Female Alexander). Jalter.

Fifth Holy Grail: Mashu. Medea. Medusa. Rin Tohsaka. Caren Hortensia. Bazett Fraga McRemitz.

Apocrypha: TBA