>>527864225
Judging by the designs they seem to be from the 2012 anime. To try to avoid talking about the NGE-tier emo shit and pseudophilosophical nonsense, they are doppelgangers of a bunch of middle school girls (if I recall correctly the doppelgangers are all a few years older than their respective girls, thus why they're taller than them) in another dimesion, constantly fighting each other.