Illya's #1 fangirl

As a friend of mine and me having been challenging each other to come up with the most ridicules Fate/SN pairings possible and write oneshot [or more, the rules are very loose.] fics of them. He ended up with Sakura/Saber, with the caveat from me that he could not use Saber Alter/Dark Sakura as part of the fic, while I ended up with with Caster/Shirou. So we're going to talk about Caster and that pairing in general.

Caster is a character I didn't really care much for partly because ...