Talk:S I N/@comment-11147564-20180718233542/@comment-1625009-20180721115557

I recall reading that Nasu WANTS the Tsukihime-crew in F/GO

the mostly likely chance for that would be a collaboration-Event (when the remake of Tsukihime finally goes public).

but Arc or Ciel could appear early as NPCs, like some other Servants that got to show up long before they got summonable (Ereshgal, Jeanne Alter, Nahza, Achilles)

then again: Gekkabijin could also refer to Void Shiki, who is a Yamato Nadeshiko