Sister is going too far for anime expo next month

Yes. It's a cosplay style called animegao kigurumi. ("Animegao"="anime face", "kigurumi"=I don't remember but something to do with wearing something) Most masks are just static, but for a while I followed the progress of a maskmaker/cosplayer who managed to rig up their masks so you could make them wink or blink by moving your mouth.

Wow, that's amazing. I almost want to try this style.