I'm beginning to wish school girl cosplays had IDs to go with them.
Just who is this purple haired bishoujo with the black and red uniform? Knowing who the cosplayer is would almost be mission impossible as it goes with these large conventions, but hopefully someone will comment and reveal which character she’s cosplaying as.
Thanks to Sammie for sending this!
EDIT: Thanks to Reryu for commenting about which series this is from! I was able to do a bit of research and found she is Kirishima Shoko from Baka to Test to Shokanju! Thanks again, Reryu!