MothMask: Who's the Prussia? or does your mom cosplay both Russia and Prussia?
Katsucon '11: Russia (with bouquet of sunflowers and hip pack with flask)
Otakon '11: same
2012 cosplays: same as for 2011 (I lost the sunflowers at Katsucon '12, but still have the hip pack with flask, and am also probably the only adult/modern-day Russia under 5 feet tall)