I couldn't find the name of the cosplayer but the pictures are all from Colossalcon 2015.
Sources are:
https://www.facebook.com/media/set/?set=a.958165450871636.1073742555.181144498573739&type=3
https://www.facebook.com/media/set/?set=a.959692674052247.1073742559.181144498573739&type=3

Say what you want about her, but this girl has a pretty sweet ass.

Base +6, cgh +8, bassfu +6, PiramidDragon +7, MachinaWeapon -9, radamantys4371 +6, Leon_26 +7, hakkibulut69 +24, somedude99999 +9, HHoo111 +6

Dear lord, #60

..Oh man, now that would be a nice time to have a pair of scissors handy...Just one snip along that blue little strip there above her ass.

Base +6, cgh +8, Kishagi +7, bassfu +6, MalkavianJD +6, MachinaWeapon +9, KingLeonidas +6, demonfou +8

The lace is a nice addition, I like it.

Base +7, Elbowsmash +6, MachinaWeapon +9, radamantys4371 +6

dat negra cabeza.
La satsuki.

Base +6

@cezul

i agree, it's smart of her to have her legs at different angles, so we can see each cheek in different position

she should've padded her top though, it's barely noticable

Base +7

She looks nothing like the character, WTF.

Base +1, ttaz -6, demonfou -8, KingLeonidas -6, scyph -6, vittusaurus -1, rorschachsface -8, LazyAssZoro -6, HHoo111 -6

This girl sure is bold! I like her ass.

Base +1, HHoo111 +6

also here
/g/3113643/22e7f3a469/

Base +20