[quote=@Pie Flavor]
A question about our setting, is the universe we are partaking in: Is it within Fate, Tsukihime, or something that is a blending of both ?

[@IceHeart]
[/quote]

It's basically a hybrid of the two.  If it was Tsukihime then Arcruid would be on Echidna's trail and she is just so overpowered that wouldn't be much fun so I've cut her out of this universe.  If it was in purely Fate, the 27 Dead Apostles aren't really too much of a thing, I believe they exist but they mostly keep to themselves and stay as hidden as possible.  Although I do believe it was technically their fault that Fate CCC timeline happens where humanity is wiped out so that they only exist inside the virtual memory of the Moon Cell.

Anyway it's my own little hybrid version so I don't have to worry too much about all that.