Don't recognize the two on the left (or at least their mothers).

Either way Kourin's been busy.

The front-left is most assuredly Ibaraki_Kasen('s).
I'm not sure about the one in the back, but the hair shading would indicate Kamishirasawa_Keine to be the one.

I know that I'm nearly ten years late, but I'll list the girls' mothers anyways.
Top far left: hakurei reimu
Top center left: hieda no akyuu
Top middle: tokiko (touhou)
Top center right: shiki eiki
Top far right: kazami yuuka
Bottom left: ibaraki kasen
Bottom middle: morichika sadame, the if they mated daughter of morichika rinnosuke and komeiji satori
Bottom right: kamishirasawa keine