Overdrive (オーバードライブ)/theories

323 is Alien
This theory can be ridiculous but still have some proofs, first thing is effects, Cyber costume, Laser Gun, it is suspicious that young girl can have such a things, second thing is a name, probably real name of this girl impossible to say loud so professor gave her number 323, last thing is Last True End aka END 3, she just taking some flying saucer and flying away, these things proving that 323 is alien.