Who is Archer-ko, you might ask? If you don’t spend long periods of time looking into Type-Moon minutia that is not a name that would be familiar to you. But she is a semi-popular fanon character that as far as I can tell originally comes from the Sword Dancers doujinshi series. She is a version of Illya from the future who becomes a counter-guardian in an alternate timeline instead of Shiro. Therefore in that timeline she is Archer in the place of EMIYA. This alternate future Illya is then summoned to the present with all the standard powers we know for Archer but in the form of a cute girl.
That is either an explanation that makes perfect sense to you or something that requires charts and footnotes to even get something close to as partial understanding of.
Sufficed to say she is a fan made character whose atheistic appeal and odd back story hooked her a small fan following, But now that she has essentially appeared in an official work she has crossed that thin but important line from popular fan creation to official part of the universe. It sort of reminds me of the whole Fionna and Cake deal from Adventure Time. It is really only a matter of time before she start appearing in things like Carnival Phantasm or Fate/Extra.
Actually the random thought that just popped into my head was: “Wait! EMIYA has all the powers he does because his origin is Swords not because he became a counter-guardian. Therefore Archer-ko should have a completely different set of powers as a counter-guardian more probably aligned to the Third Magic.” Then I remember the MST3K mantra and the fact that the character was mostly made because someone thought dressing Illya up as Archer was hot.


