Forgot to mention, I'm also looking for the vocalists for the voiced tracks from the Beginnings/Eternal OST as well.
Yuki Kajiura and Kalafina, of which Kajiura is a member of.
Kalafina don't voice any of the tracks on the OST, just the singles. I'm looking for the vocalists of the voiced tracks from the movie tracks (wo ist die Kase, she is a witch, dream world, etc.)
Movies 1 and 2
Wo is die kase: Suginami Junior Chorus
Witch World #2: Yuri Kasahara
She is a witch: Yuri Kasahara, chorus: Yuriko Kaida
I miss you: Hanae Tomaru
Her wings/Rebirth: Suginami Junior Chorus
Mada dame yo: ASUKA
Absolute configuration: Hanae Tomaru
Dream world: Hanae Tomaru
The worst ending: Hanae Tomaru
I was waiting for this moment: Yuriko Kaida
Forgot to mention, for Her wings and rebirth it sounds like the Tokyo Philharmonic Choir, which Kajiura always hires for her choral pieces, but there's no mention of another choir in the booklet.
And also, no vocalist was credited for Noi!
Could be Kajiura herself since she knows German.
Never ask a stupid question that Google would have answered here again.