The Gessen girls infiltrate their middle school to get more info on Gekkou and Senkou.  This means cosplay, and outfits that are way too small.
Who are you, really?
Wer bist du in Wirklichkeit?
¿Quién eres?
¿Quién eres?
Qui es-tu ?
Chi sei, in realtà?
Quem é você?
Откуда ты такая взялась?