I always remember about this project too late, it seems, as I'm not a regular forum contributor. Nevertheless, I don't see anywhere that says no more submissions are welcome (let me know if I have missed this very announcement, and I will retreat, humbled).
I am a classically trained mezzo-soprano (three years training) and my range encompasses G3 to Bb5 so pretty much anything in Kalafina/ large group FJ repertoire except Keiko's lowest parts.
I noticed that
@juchanx3 wanted to do something from Fate/Zero. It just so happens that I am in possession of a TV size piano score for to the beginning (which I'm open to trying to adapt for different instruments). It looks pretty difficult to play, but I'm sure someone with a few years' piano study could manage. I also have sheet music (transcribed by me, by ear) for all three vocal parts plus Kaida's chorus. All parts are in my range, so I could sing all or any, if someone else wants to jump onboard. Same goes for Kimi no Gin no Niwa, and storia.
Also, to
@magicmagiamahou, should you be in need of a second voice for sis puella magica, I'm already fully familiar with both melody and harmony.
Finally, I don't know why you would, but if anyone needs a soprano or tenor recorder (the wind instrument) part to supplement any of this, I'd be glad to help.
Once again, my apologies if I have overlooked something...