[DISCLAIMER: This story is past beyond the first arc of Fate/Grand Order, so spoilers are a given. Also, this is a massive x-over with FGO as its primary theme, so if nobody likes x-over, I am sorry, but this story isn't for you. Please keep your hate comment to yourself. Also, bad writing.]
Chaldea Security Organization.
A non-profitable organization created with the mix of both magecraft and science as a way for humanity to survive extinction.
First made to investigate the cause of said catastrophe, Chaldea soon becomes one organization with the sole purpose of stopping any singularity within histories of mankind from changing and damaging the flow of time.
But now this operation becomes bigger, branching to other worlds as more singularities happened outside of their own.
Xxxxxxxxxxxxxxxxx
"Common Master Gudao Tomiya, Common Master Gudako Tomiya," a female is seen sitting at her desk, smiling as she sees two people standing before her, "You two are now going to be transferred to the Outer Division."
The orange-haired girl, Gudako Tomiya, questions her, "Outer Division? Never heard of that."
"It is a new division made by Chaldea. Recently the R&D Division has finally able to upgrade the Chaldeas system thanks to the research made by the late Dr. Roman that was found recently. Because of that, the Chaldeas is able to predict even further into the future, as far as hundreds of millions of years."
The black-haired male sighs out loud, rubbing his temple, "Let me guess, one billion years into the future the Earth is going to be destroyed."
"It is cliché, I would admit that," the female nods, still sporting a smile, "But this is different this time around."
Gudako wonders, tilting her head, "Meaning?"
"Before explaining even further, I would love it if you two know that the information that shall be given to you is going to be confidential. Only those within the newly started division may know of this."
The two nods, gulping as they are ready for whatever the information is that deserves such secrecy.
Xxxxxxxxxxxxxx
"Errgghh…."
Hot…
Very hot…
Gudao opens up his eyes.
Eh?
He quickly stands up, pulling himself up as he looks around to where he is right now.
Gudao sees a bed in this room, and a desk nearby.
This is his room.
"Gudako!" he moves close to other bed.
His twin's bed is right there.
But she isn't around. Where is she?
Why is this room so dark? This place is hot even. What happened to the air-conditioner?
He moves toward the door, pressing a button.
Nothing happened.
Wait, the door isn't open up. Why?
He keeps on pressing the button. He then proceeds to punch it, but nothing happens.
"Of all time…" he mumbles, pulling out a gem from his pocket.
BOOOM!
The gem explodes as soon as it is put close the door, breaking the door open.
Gudao quickly jumps out of the room, now stumbles into the corridor.
"Wha-," he found himself startled by the scenery of the outside.
The place is so dark, not to mention it looks so dirty.
As if nobody has ever clean this place up.
"Wait…" he mutters, "I know where I am right now…"
He quickly turns around, now running forward as he moves along the corridor.
Gudao finally reaches the end of it seeing the light at the end of it and steps to where his journey ends.
He now sees something really bizarre.
He sees that he is standing on a platform made up of floors, but branching upward, downward and all over the place across the vast space as if he is outside.
The space has nothing but dark blue around it, except for a white sun above it.
He alos notices something filled with mana focused on where he stands, as he quickly moves away from there. Whatever that thing is, he is pretty sure standing there is a bad idea.
Okay, now he has no idea where he is right now.
He remembers something; a memory from before…
Xxxxxxxxxxxxxxxxxxxxxxxx
[FLASHBACK]
"The research did by Dr. Roman is an extensive one. He is making sure that when we found ourselves in a better position if we ever to face the same problem with King Goetia before he passed away."
The older female now pulling out files, putting them before the two, "As you should know, Dr. Roman, I mean, Solomon himself is a Grand Caster, and having that class means he is capable of seeing the future as far as he could. He did sees another catastrophe, thus why he puts more into researching the Chaldeas and the Fate's systems' capabilities. This Division is made because of those researches and findings he made."
"I don't get it…" Gudao mutters.
"Chaldeas has pinpointed that the end of the world is due in both few years to come and in the next millions of years."
Gudako raises her eyebrow, "Da Vinci-sensei, your statement is contradicting. How come one world can be destroyed in two different times?"
She shakes her head, "I don't really get it either, but that's what Chaldeas had told us."
Gudao now springs a question, "What about the singularity that is causing it."
"That is even worse. We found that the cause happens not within this world, but other worlds."
"You mean like, alternate dimension?"
"I mean like, Kaleidoscope."
Gudako now turns serious, "Second Magic? Are you saying that somewhere, in a different world unlike ours, something happened that put our world to an end?"
Da Vinci nods, "True, and you two will be one of the few Masters authorized for this kind of missions."
Gudao quickly speaks up, "Wait, wait, back up! Why us? There are at least 10 higher-ranked Masters in here, and one of them is ranked Cause by the Mage's Association."
"Well, you two seems to have a good potential in becoming both Masters and magi it seems. Not to mention, you have been doing some sort of extra works ever since you two are here, right?"
Gudako snickers, "It's not like we have any other choice. We are just Commons after all. Unlike our Cause-senpai, we are not the one who saved the world from those demon pillars."
Da Vinci is still smiling at them, "Really? But I've heard from Zeltretch something about dragons and devils and some other stuff I couldn't understand. He holds quite an impression on you two."
At that moment, the twins tensed up, with each of their minds filled with variation of 'Curse you, Zeltretch!'
"Either way, do not worry about doing your first job and not having a Servant. She will be coming with you."
The door behind them opens up, with a girl of light purple hair, wearing a pair of glasses and a white coat around her, looking at them with a smile, "Good morning, senpai."
Gudako is a bit annoyed by her words, "Mashu-senpai, why are you still insisted on calling us that? You are not 'left with few years to live' anymore, right?"
"Sorry, it's just a force of habit," the girl named Mashu chuckles.
Gudao now wonders, "You will be working with us? What about Ritsuka-senpai?"
"He… will be busy for a really long time…" Mashu somehow loses her smile, pouting away.
Gudako just stares at her, "Did he accept all of the chocolates from all of those female Servants during the last Valentine again?"
"He just… really loves chocolates…"
Mashu quickly shakes her head, "Anyway, I will be helping out with you two as your primary Servant, so please do not ignore me, okay?"
The twins just mutter something under their breath, "Ah, sounds like she has a tough life…"
Xxxxxxxxxxxxxxxxxx
[PRESENT]
Of course that's what happened!
Right after their transfer into the new department, they are quickly being put into their first mission.
But this is not where the first mission is at. Why is he in this strange ominous space with eldritch architecture?
Gudao keeps moving forward, eventually finding himself entering a corridor that has been cut off from its building, stranded close to that place and now entering a huge room with a a huge object in the middle of it.
He quickly recognizes of that object, "That's… Chaldeas…"
Chaldeas, the system that is used to observe the future and the past of the world, alongside Shiva; this is Chaldea's main modus operandi. By viewing the future, the past and the current state of the world and pointing out any singularities or anomalies, Masters working under this organization will be sent to the location given to fix those singularities.
But right now Chaldeas doesn't seem to be functioning at all. In fact, this room itself is not functioning.
"Is there no electricity here?" Gudao mutters to himself.
His feet bring him close to one of the keyboards, pressing onto it. Semi-transparent screen shows up before him, which prompts him to mutter some more, "But I can still use this thing. Then why is it so dark in here?"
Gudao takes a look at the screen, showing the desktop section within all computers and now finding himself pondering, "What should I search for here?"
He has no idea where to start searching. With the possible numbers of files within this computer, it will take ages to search for a small piece of info.
Maybe he should check whatever recent files this thing used before, but where?
Sighing reluctantly, he pushes himself off from the desk and now wandering toward the giant globe.
His eyes now looking at the globe, now having another thing to question, "Where the electricity came from? How come Chaldeas isn't getting that?"
"Couldn't believe there is even a soul in here left."
A male voice is heard from his back, now prompting him to turn around and face whoever is standing at the door.
Gudao is now seeing a blue-haired man in a blue tight suit, looking straight at him. There is a shoulder pad in the shape of a dog's head on the left shoulder.
The unknown man is smiling at him, "I should be thankful to Dagda there is another soul in here. I could get bored in this place. Now, here's hoping that you could provide me with an entertainment."
The man now moves downward, sheathing his weapon as he is getting close to the man near the globe.
Gudao is freaking out right now. Somebody is going to kill him.
But that's not what is inside his mind right now. Inside his mind, he is looking at the man's familiar face and his weapon he is carrying right now.
He knows who this man's face is. This guy is one of the Servants owned by his senior; Cu Chulainn, the Hound of Ulster.
Unfortunately this guy is using a sword, which begs the question of his identity.
Cu Chulainn has been known to be using a specific spear that is famous for being a surefire weapon when used against the enemy; hitting the target no matter what.
He is also known among Masters as that one guy that can summon a giant wooden figure that burns its enemies alive and a man that can become a humans-sized lizard armed with a spear.
He is certainly has a record of being a Lancer, Caster and Berserker as a Servant, but not Saber.
"Daydreaming, boy!? You shouldn't!"
Gudao is finally snapped back to reality as he quickly pulls his right arm upward, shielding his head with his arm filled with Reinforcement.
The moment the blade hits him, he is pushed to the side, flown far from him.
"What a strange human you are," this person snickers, "You can deflect Gae Bolg even with a simple Reinforcement. You just received my seal of approval."
Gae Bolg? That sword is Gae Bolg!? That's impossible! Gae Bolg has only been known as a spear no matter what source. Everybody knows that!
The man now approaches him, ready to finish him off with his sword, but then something glows beneath him.
"Rune?" the Servant is startled with the floor quickly explodes, leaving a hole with him falls down and into the abyss.
"Are you okay!?"
Gudao turns to his side, seeing two figures approaching them as one of them calls him out, "Are you hurt anywhere?"
Gudao looks at the two female figures that just saved his life, noting one of them having a long silver hair in orange clothing.
But the other one earns his attention the most, "G-Gudako?"
The other female, the orange-haired girl is in shock, hearing his words, "You know me?"
What the…
The girl with silver hair shakes her head, seemingly sighing in relief, "Thank the Root… we have been stuck in this place for a really long time now and you are the first person we saw after that incident…"
"What incident? What are you talking about?" Gudao springs a question, looking confused as the two is in shock.
The orange-haired girl questions him, "The incident with the Chaldeas. Professor Lev bombed this place after breaking into this place. He used Chaldeas itself as the bomb."
Gudao is still in the state of confusion, looking at the two, "But Lev is dead. Ritsuka-senpai and his Servants defeated him before in one of the singu-"
Something appears across his mind.
What if… this isn't his Chaldea?
Is it Zelretch again?
Exchanging looks with the two, he now sighs as he mumbles, "I… think… I am not in my world…"
"Of course we are not!" the silver-haired girl scolds him, "We are in an unknown space with-"
"Director, I don't think that's what he meant," the other girl tries to speak to her, as she quickly swallows her words.
"What do you mean?"
Gudao opens up his mouth again, "I don't know how, but I came from an alternate world and in that world of mine, Chaldea is still standing."
"D-different world!? How is that even possible!?"
"Calm down, Director," the orange-haired girl tries to calm her down, "How about we introduce ourselves first? I am Gudako Mamiya."
She really is Gudako, Gudao thoughts as he takes a look at her. She is Gudako with a different name. Could she be a counterpart of his sister?
"Gudao. Gudao Tomiya."
The silver-haired looks away, mumbling, "Olga Marie Animusphere. You might have known my name; I am the Director of Chaldea."
Gudao quickly pulls himself up, "Wait, you're ex-director?"
"E-ex-director!?" Olga is startled by his words, "What happened to me in your world!?"
"You were… killed by Lev in one of the singularity…"
Olga quickly has her hands grabbing his collar, "Is it Fuyuki!? Is the singularity Fuyuki!?"
"I… I don't know! I wasn't around when Chaldea first started its mission. I just heard from the history lesson that you were killed in the first singularity they've gone to…"
The director lets her hands go, now rubbing her temple, "I was supposed to be killed Lev, but somehow my soul and body was transferred to another world, where I was forced to team up with a True Ancestor and her friends."
"When I came back to my world, I found myself travelled back through time, a month before the journey to Fuyuki begins. I quickly apprehend Lev and start our mission as usual. And then this happened… How did he even escaped the Clock Tower; even under the nose of Lord El-Melloi II himself is beyond me."
Gudao quickly responds to her, "That's because he is a demon pillar!"
The two girls are now confused with Gudako mumbles, "Meaning?"
"Lev was used by Beast I, Goetia under the guise of King Solomon, a Grand Caster and our enemy before. His magic crest turns him into one of the demon of Goetia, Flauros and my senior is that one that beat him before."
"Demon… pillar…" Olga seems to not be able to handle this news very well.
Her eyes dilated as she falls onto the floor, hugging herself in a fetal position as she mumbles, "Lev… is a demon… to think… to think that we trusted him… so much…"
Gudako ignores her as she asks Gudao, "Say, Olga and I were supposed to be heading to a singularity in Okeanos to save the future from destroyed. It is our fourth singularity ever since we started our mission. When were you from before?"
"From my time, the first objective of Chaldea has already been fulfilled, so the future is now saved. Right now, all we are doing is just cleaning up any minor singularities that Chaldeas recorded while handling all of the demands from the Mage's Association."
"Owh? What kind of demand?"
"I don't really know. This matter isn't being discussed right now as Chaldea is still not in the same boat as them so much. There are the factors of us using science alongside magecraft, which most of them just pretty much hating that idea, and then there is the fact that a lot of Servants keep on leyshift in and out of institute, which doesn't sit well with Einzbern and their obsession with starting Holy Grail War."
Gudao stretches his arms, continuing his story, "My sister and I were transferred to a new division called Outer Division, where apparently the future of the world is going to be destroyed thanks to something bigger than before. We are going to travel to different worlds to solve a lot more singularities that might affect us in the future. That's when I found myself here."
Gudako wonders, "Why do you need a division of your own for that? Can't your Chaldea just put that as your new current objective and send out all Masters you have across all related singularities?"
"Outer Division is a secretive division, right?" Olga now pulls herself up, wiping her face off from something as she continues, "If Mage's Association is constantly interfering with our works and trying to get onto our backs like that, I doubt they would be happy to find out that another catastrophe has been found thanks to science. And with some of our operation revolve around using the combination of mana and scientific process, able to replicate Fifth Magic and now Second Magic as well, this totally won't sit well with them, especially those folks from the Clock Tower."
"They are going to try their best to hog the glory while stopping us from using our "heretical method" as what they would have claimed, and things are going to get a lot worse than just world destruction on an inter-reality-level."
The silver-haired magus now sighs as she turns toward Gudao, "I'll say that whatever your world's future's problem is, we are all in this together now. Who knows, this could also be our world's problem as well."
Gudao now mutters, "It's great that we are now teaming up, but what are we going to do from now on?"
Olga has her head looks around all over the place, "I'll say this place may need to have some makeover. Wherever this place is, the vast space around us is loaded with mana and these sections of Chaldea floating around are leeching off some of them as its tertiary power. Electricity is out of question and we should only use the emergency power supply when we need it the most. I'm sure this way the computers, the summoning circles and even the Chaldeas and Shiva can work properly as well."
She then turns toward the two, "Did you see the roads outside?"
"Yeah, I've noticed that they are branching off toward some sort of gates."
"I can tell that those gates are leading toward whatever is binding us here. Hypothetically, those are our version of singularities. Solve them and we can be sure to get out of here."
Gudao mutters in his mind. He is wondering if this ruined Chaldea is a hub world, those gates are other worlds, and this whole situation is a sick joke made by a stronger being mirroring a video game.
Gudako seems excited, "Then, we should go to whatever those gates will lead us!"
"Not you, Mamiya," Olga mutters, "You are needed here. I can't all the work myself."
"Owwh…"
Xxxxxxxxxxxxxx
The three now walk out of the corridor, now walking back to the forked and branched paths, with Gudao is now looking all over the place, looking at each and one of the gates.
Gudako quickly points out toward somewhere at the left, down from the platform they are standing at, "Over there!"
"Whoa there, people! You are not going anywhere without me!"
Something jumps out from the vast space and lands in front of them.
"You again!" Gudao screams as he sees the enemy chuckling and swings his red sword around.
"You have been very unlucky to meet me, Saber, the Hound of Ulster! Now be nice and fall prey to my Gae Bolg!"
Olga points her finger first as she goes to shoot a beam of red toward him, but the shot only moves past him.
Saber pulls himself up as he turns to see her, "Nice shoot there, lady, but you will need more than that to fend me off!"
He turns his feet around and goes toward her, ready to strike her as Gudako screams out, "Director!"
"Gae… BOLG!"
Upon screaming, his sword lights up, filling the place with bloodlust beyond comprehension, and the blade is now ready to take the life of whoever is being targeted by it.
And the latest victim is the silver-haired maiden before it.
Gudao find himself moved fast, reaching close to her and puts his left palm to stop the attack from coming toward her and him both.
Muttering something, he fills his palm with prana and conjures a palm-sized four-petal flower that pushes the sword away from him, now engaging the man in a struggle of power.
The man chuckles as he mutters, "Nice one, young man! You could have been one of the few people that managed to deflect my blade. But that alone isn't enough! A mere human cannot defeat a Servant!"
Slowly, three of the petals break and disappear, with the tip of the blade is getting closer to him.
"I know!" Gudao screams back at him, "That's why I stand here right on this spot!"
He fills his feet with prana, now pouring it into the surface of the land as it is now breaks off, revealing a circle with shapes and lines inside.
"It's the Summoning Circle!" Gudako exclaims as Gudao smirks, "As I thought."
He then screams out, "Come forth, my Servant!"
The circle gushes out wind, blowing him off along with his sword as he is being pushed away from Gudao.
A black-haired female in glasses, wearing a school uniform and a muffler around her neck is seen standing behind him as she moves around him, muttering, "It's okay, Master. I am here for you."
Eh?
Gudao is now filled with confusion.
Who is she? What kind of Servant is she?
He can see that she is an Archer, but he has never seen a Servant with a school uniform as a default costume. In fact, he has no idea who she really is.
Saber slowly pulls himself up as he smirks, "Another Servant? Finally, a challenge."
Archer runs forward as Saber goes to try and slash her head.
She quickly halts her movement as she mutters, "Link Start."
At that moment, her appearance changes. Her hair is no longer black, instead a cyan-haired color. Her glasses also disappears, with her eyes are now having the same color as her hair's instead of brown eyes. Her costume changes into a desert-colored military jacket as well as bulletproof armor and combat boots.
She then jumps high, landing onto the blade and jumps higher over him as she pulls out a handgun, Glock 18C and starts spamming bullets right onto her target.
BLAM! BLAM! BLAM!
Unfortunately two of the shots ended up hitting his eyes, as he quickly closes his eyes, screaming in pain, "D-Damn it! What is up with that weapon!?"
Olga and Gudako just stare at the fight, with the former mumbles in confusion, "What kind of… Servant using a gun? A modern weapon at that?"
Archer lands somewhere else as she flips and runs back to her Master, readying her weapon once more.
Unable to use his eyes anymore, Saber starts throwing his slashes around, screaming out, "Get back here, you sneaky Archer!"
"Nice shot there, Archer," Gudao compliments his Servant, "You seem to be able to shoot a no-scoped gun with such a great accuracy. Is your legend has anything to do with that?"
"Quite close, but not in the way you thought."
Saber screams in anger as he throws his sword upward, "That's it! You are done, lady!"
He then grabs his sword in a reverse position, leaning forward as if he is standing with four feet.
Gudao quickly recognizes this stance, "Archer, he is going to unleash one of his more dangerous Noble Phantasm!"
"Not when I can do mine first," Archer calmly throws her gun away, now holding a rifle as she mutters, "Hecate."
The rifle seems to be brightens up as she quickly presses the trigger as soon as Saber pulls himself up.
BANG!
The bullet from the rifle is shot straight toward the enemy, going through his chest and pushes him off from the cliff.
"That's dirty!" Saber screams out loud as he falls back into the vast space, now disappears from the sight.
Archer has her appearance changes back to its previous form as she turns toward Gudao, "Let's not waste our time, Master. Aren't we supposed to go somewhere else?"
She quickly grabs his hand and pulls him off, straight toward the glowing gate as they disappear upon getting into there.
Gudako wanted to call him out, but she just stares at the two disappear from her sight as she just stands there, not moving.
She then turns her head toward Olga, who is kneeling near the circle as she is looking straight toward it.
The circle is seen to be on top of another platform, as the circle itself is not embedded onto the platform, but floating off in the form of light.
Olga mutters, "This circle… is not like ours. I have no idea what this thing really is, but it seems to be summoning a peculiar Servant…"
Down there, at the vast space, a figure with purple hair and white tint on them, wearing purple piece of armor with some black marking and having her face covered with an eyepiece, is looking at the bigger platform above her, where the ruined Chaldea is located at.
She snickers as she turns around and grabs a giant cross-shaped shield beside her, slowly entering a light as she disappears along with it.
First chapter end.
So, this is a crossover of Fate/Grand Order with everything else. You know those stories in located in Fate/Stay Night + X-over categories? Those one-shots about Servants from different stories being summoned into Fuyuki's Fifth Holy Grail War? Yeah, this is the FGO version of it. And it also has a story.
In this story, the Servants aren't only going to be characters from other stories, but existing Servants with alternate backstory, just like Saber in this story. I will include the stats of those two Servants at the end of this note. Though, I maybe wrong when it comes to making stats. Apologies then.
If you've read my other story, Fate DxD Order, a crossover between FGO and High School DxD, this story is made with the same formula. Both Gudao and Gudako can have a team of Servants working under them. This time, they are unconventional Servants that did not appear in FGO at all.
Any ideas for future Servants? Request below and let us all have fun!
Next: Gudao and his Archer arrive in the old days of Camelot, when the Once and Future King is still ruling Britan. But the king is actually Mordred? Also, Artoria Pendragon is one of the Knight of Rounds, but she is using Clarent?
Servant: Archer
True Name: Shino Asada / Sinon
Alignment: Neutral Good
A gamer of VRMMO Gun Gale Online and Alfheim Online, she starts to play the former as a way to cure her trauma and fear of guns. From when she was little, she was involved with a bank robbery and found herself shot a man dead. Thanks to that experience, she is crippled by even a mere sight of a realistic-looking toy gun.
After meeting a crossdresser named Kirito and involved with a VRMMO criminal case of Death Gun, she has finally being cured from her fear.
Playing as Sinon, she is known as a legendary lone female gamer among the male-filled gamer communities with an incredible shooting ability. Her fear of gun is not being implemented here and as such, enabling her to excel in this game. This skill is also available for her in the real world and in other game where she plays as an archer instead.
Strength: E
Endurance: B
Agility: A-
Mana: D
Luck: C
Skills:
Independent Action: B
Clairvoyance: C
Eye of the Mind (True): C-
Wings of Faeries: A+
Noble Phantasm:
Artificial Bodies for Artificial Lives: Link Start: A
Type: Anti-Unit (Self)
As a gamer that plays more than one games, she has at least three known avatars for her use within three different games. Sinon is capable to change to her avatars anytime as she wants to without any limitation.
The Legend from A Powerful Rifle: Hecate: A-
Type: Anti-Team
Derived from the name of the rifle, PGM Ultima Ratio Hecate II, Sinon is able to invoke her legend as Hecate during her time as a GGO gamer whereas she is capable of shooting her seven targets without fail up to seven times in a single fight. This rifle will turn useless after usage in a really long time.
A Bow Crafted by Legends: Shekinah: A+
Type: Anti-Team
A legendary weapon with the game called ALO, used alongside with her skill, she is capable to use this without fail against ten of her enemies and can be strengthened with her own mana. The projectiles, unfortunately, suffer a longer time of reload between arrows.
Servant: Saber
True Name: Cu Chulainn
Alignment: Lawful Neutral
This version of Cu Chulainn has similar backstory as any other counterpart of his, but with a certain difference. The spear that was known as Gae Bolg is instead a sword from his world. The witch Scathach has made a sword from the Phantasmal Beast, Curruid and is later being given to her student, Cu Chulainn himself.
Strength: B
Endurance: C
Agility: A
Mana: C
Luck: E
Skills:
Magic Resistance: C
Battle Continuation: A
Disengage: C
Divinity: B
Rune Magic: B
Protection from Arrow: B
Noble Phantasm:
Barbed Sword that Strikes with Death: B
Type: Anti Unit
Soaring Sword that Strikes with Death: B+
Type: Anti Army
Gudao's team:
Archer- Shino Asada / Sinon