It'd be easier to have them happening in the same school and at the same time... but going with the reincarnation theory...
Kyon must get Berserker. Beserker's cover is she transfered back from Canada... the reason she got summoned is stray pieces of data were lodged in Kyon's body from when she died in the first place and her rescent movie incarnation. For added fun, as she is berserker, she has both of those personallities running around in her head... which means Yuki is going to stick to Kyon like glue and this will cause Berserker to fixate on her and Kyon. Berserker has contractual obligations to aid not hurt him and no superiors beside him anyway. Thus she fixates on both of them... then after a rant by Kyon, about how oddly and naggingly familar this mess is. The one closed space, past life theatre session later...Berserker figures out about alternate mana recovery techniques and won't leave either of them alone about it.
That is without considering that Kyon will just call her by her name anyway and with Yuki playing bodyguard, everyone in the War proper thinks Yuki is caster and the refuse to believe that Berserker is Berserker... except the one from the school... who is baffled on how either of the two are Servants as that they were both around long before the current Grail War. Trying to get an explination when Haruhi walks in to drag Kyon off... needing to explain the already convoluted explaination... Berserker explains she is back from a town in Canada called 'The Throne of Heroes, a grand name for an isolated, cold, and technologically backwards (explaining the lack of phone calls), town where everyone lived underground and pretended the surface didn't exist. Its in really rural Northern Canada and only the ice road truckers ever came by. There was one town kind of nearby but those guy were not really sociable and the two towns spent most of their time pretending the other town was even less existent than the frozen surface. That and reliving past glories.
Thus explained its is now true and the bits about how clock tower mages didn't believe in Canada leave the other participant baffled. It doesn't help that the CTM really don't acknowledge the legendary country of Canada. Mostly, because it never actually ceded from being a British territory, but said participant fails to know that part. Bonus points if you can convince people that the money pit of Oak Island is actually the back entrance to Avalon and they just don't like visitors.
Kyon must get Berserker. Beserker's cover is she transfered back from Canada... the reason she got summoned is stray pieces of data were lodged in Kyon's body from when she died in the first place and her rescent movie incarnation. For added fun, as she is berserker, she has both of those personallities running around in her head... which means Yuki is going to stick to Kyon like glue and this will cause Berserker to fixate on her and Kyon. Berserker has contractual obligations to aid not hurt him and no superiors beside him anyway. Thus she fixates on both of them... then after a rant by Kyon, about how oddly and naggingly familar this mess is. The one closed space, past life theatre session later...Berserker figures out about alternate mana recovery techniques and won't leave either of them alone about it.
That is without considering that Kyon will just call her by her name anyway and with Yuki playing bodyguard, everyone in the War proper thinks Yuki is caster and the refuse to believe that Berserker is Berserker... except the one from the school... who is baffled on how either of the two are Servants as that they were both around long before the current Grail War. Trying to get an explination when Haruhi walks in to drag Kyon off... needing to explain the already convoluted explaination... Berserker explains she is back from a town in Canada called 'The Throne of Heroes, a grand name for an isolated, cold, and technologically backwards (explaining the lack of phone calls), town where everyone lived underground and pretended the surface didn't exist. Its in really rural Northern Canada and only the ice road truckers ever came by. There was one town kind of nearby but those guy were not really sociable and the two towns spent most of their time pretending the other town was even less existent than the frozen surface. That and reliving past glories.
Thus explained its is now true and the bits about how clock tower mages didn't believe in Canada leave the other participant baffled. It doesn't help that the CTM really don't acknowledge the legendary country of Canada. Mostly, because it never actually ceded from being a British territory, but said participant fails to know that part. Bonus points if you can convince people that the money pit of Oak Island is actually the back entrance to Avalon and they just don't like visitors.