That Shou is Thursday and she's a total bro. (Sis?) She's also one of two* people that have done Touhou cosplay at AB every year since 2008, the first year that anyone did Touhou cosplay at AB.
*Possibly three, I forget if ManPatchy (I only ever remember his real name, sorry D: ) has done it all five years. I'm reasonably positive he took a year off at one point.