The only one I know is Patchy.
Beside that,can't tell who is who ;_;

Left to right:
Rumia, Koakuma, Meiling, Remilia, Sakuya, Patchouli, and Flandre.

I could be wrong though.

Checking the coloured version, I think that left to right it should be: Rumia, Flandre, Meiling, Remilia, Sakuya, Patchouli and Cirno. If I got it wrong change it back as it was