I can identify Ali al-Saachez and Jake Martinez from the left over there, seems they're all some kind of rogue gallery of sorts. Someone else help me tag this.

EDIT: Also looks like Ladd Russo, top second from left. GOnna tag it for now, if someone else has a better guess, change it.

Added Kihara from Index/Railgun verse, bottom right looks like villain from Persona 4, not sure though

I spy Mayl from Megaman Battle Network/Rockman.EXE.

Madoka and Homura with panty bow. Kyubey is Chuck.