AN: While watching the latest Fate series a comment in my anime group got turned into a challenge that got turned into this. The guilty member knows why.
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There was something not right in the city of Fuyuki. Tohsaka Rin knew that with the Fifth Holy Grail War imminent there would be unscrupulous Masters out and about in the city, making trouble that normally she or that damn troublesome priest would have to deal with. Unfortunately as it was now anyone making trouble would have to be dealt with in the context of the War itself, which meant that first Rin had to summon her own Servant.
While the recent spate of "gas leaks" and fires was a sure enough sign of a malevolent Master making trouble with their Servant, there was definitely a certain oddity to the start of this war. Other than starting far earlier than it should have, the damage thus far seemed less magical than it should have been. At best Rin supposed that mundane means were being used to cover over the magical attacks, but during previous Wars few bothered with such deception.
More importantly, when Rin had been at school today - an hour early because of her father's puzzle box! - the Matous had been in an odd state. While it wasn't unusual to see Sakura at least marginally happy, especially if she had been spending time away from Shinji and with Emiya, she had seemed unusually animate and outgoing. While doubtlessly linked, this had to be related to the fact that Shinji on the other hand had spent the whole day in some sort of daze, his eyes glazed over with a look of horror.
Pausing in her preparations, Rin went over to some of the tomes on her shelves and pulled out a select one. Quickly leafing through it, she found the image she had been looking for and felt an involuntary shudder run through her body. The man in the 18th Century woodcut image of the dangers of a magus peering unprepared at the horrors of the universe definitely had the same expression as Matou Shinji. Something had clearly happened with them, and it gave Rin pause in her mental planning. She had already written the Matous off as having no suitable candidates as Master for this war, but despite Shinji's complete lack of magical ability and Sakura being Sakura perhaps they had pulled something off under the supervision of their withered grandfather.
Making absolute certain of her preparations, including doing an extra triple check of the clocks and her timing to make sure that the summoning went off perfect, Rin went into the ritual. At first everything seemed to be going well, but as she began to reach the peak of the summoning ritual she felt that there was something subtly off. She knew that as she fed prana into the grail it would forge a link and then eventually start feeding energy back to her to manifest her Servant, but the response she was getting had a strange feeling to it. While she had obviously never done this before, her instincts as a mage told her that the feedback she was getting was not quite right.
It was the sort of thing that was hard to put into words, but if someone had forced her to give a description, Rin would have said that the feedback should have been like the taste of static electricity upon the tongue, but instead it was faintly flavoured with an oily feel and something like burnt peat. For a fraction of a heartbeat Rin considered pulling back, but she knew that this was both her only chance to summon her Servant, and that if she tried to abort now it would result in far worse a disaster than if she pressed on.
Finally she reached the final note of the summoning and felt the power of the Grail pushing back towards her, filling the circle with energy to manifest a Heroic Spirit. The energy then kept expanding, overloading the summoning circle. Rin's eyes had just enough time to go wide before there was an eruption of undirected magical energies that caused her to lose track of the world for a second. When the world stopped spinning, the room was a smoke filled mess.
Rin almost but not quite broke down crying, and instead settled for something of a whining temper tantrum as she tried to piece together what had gone wrong. Her preparations were immaculate! She had gone over everything a dozen times and then an extra three in consideration for whatever the Matous might have been up to. She can inscribed the circle perfectly! It shouldn't have overloaded, she had been filling it right when her od was at its peak so...
Rin screamed in frustration when she realized that all the clocks in the house had gone forward by an hour last night. She had forgotten to put them forward and thus all that careful checking of the time meant that she had been performing the ritual at the wrong time! How could she be so stupid?
Through the stone ceiling someone called out in irritation, "Keep it down down there!"
Eyes snapping back open at the fact that there was someone inside her house, Rin suddenly realized that just because the circle had exploded did not necessarily mean that the spell had failed. Moving as fast as her legs could carry her, she found herself hurling open the door to the parlour above her lab, still dishevelled from the explosion and panting a little from the heat build up of her own reinforcement magic. What she found on the other side was not what she expected.
Her first impression was that there was some sort of burglar inside her house, but she quickly rejected that for two reasons. The first was that there was no way a burglar could get through her wards. The second was that despite the suspicious black turtleneck sweater the man was wearing and the way he was rooting around in the wreckage of the room, his appearance was far too well groomed for a criminal, especially since he was clearly not Japanese.
Turning at her arrival and revealing a smugly handsome face, the man looked around in disgust at the way the furniture had been rearranged by the out of control spell and commented sarcastically, "This place is a sty. You should really clean it up. I mean, do you want ants? Because this is how you get ants."
Finding herself gaping at the dismissive arrogance of the man before her, whatever Rin was going to say was cut off by the realization that the man had helped himself to a bottle of brandy from her father's old collection and was clearly setting out to make himself a drink. Trying to sort out just what to say beyond spluttering outrage had the man note, "You probably shouldn't do that, it wrecks that 'kinda hot, kinda cute schoolgirl' thing you've got going on. I mean, I wouldn't bang you for at least two more years since we're not in Alabama or the Alabama of Europe, AKA your old fascist pals - incidentally, the way I know that is so freaking cool, even if your country is still super creepy about little girls - but I would probably do you one day."
Blushing with a combination of embarrassment and outrage and trying to figure out just what to say as the man poured himself a drink, took a sniff and shrugged dismissively before he started to sip anyway, Rin finally blurted out, "Are you my Servant?"
The man glared at her and replied acidly, "Do I look like someone who only thinks he's people? I do actual important things with my life."
Rin staggered back at the vehemence of that, but then she realized that a particularly powerful Heroic Spirit might very well baulk at the idea of being the Servant of a mortal. It was one of the big reasons for the Command Seals, which Rin noted were in fact on the back of her hand now. She almost began to invoke the use of one right then and there but she realized that she would have to confirm that this person was in fact her Servant first.
Grinding her teeth to keep from screaming at this arrogant ass of man, Rin asked, "Are you Saber?"
The man snorted and replied dismissively, "Pfft! Unlike those idiots back in school who took fencing, I did a real sport, lacrosse! Saber? Please."
Damn it! Damn it, damn it, damn it, damn it, damn it! Not only had she failed to get a properly obedient Servant but she hadn't even got the best class. But wait, if he wasn't Saber, from what that damn priest had said, by process of elimination...
"Are you Archer?" She asked.
The man grinned after taking a sip of her brandy and said, "Bingo."