Flippernino said:
The picture of Kyouko seems to be derived from post #967806. Akari's pose is obviously the one from the anime's opening segment, but now I'm wondering if the others are all derivatives of other images as well. If you guys happen to recognize any, post them here.

Chinatsu, Yui, Sakurako and Chitose are all from the S2 charasong CDs.