Do you think there might be any hints in the fact that before aizawa comes in posessing Kasumi, you can clearly see her shadow. Could this potentially be another hint towards your idea of the whole unable to deposess?
Take the amplified (what the fuck) and the reversal (prime bullshit), then smash together those two different expressions of infinity to create and push out imaginary mass.
Imaginary technique: what the fuck is this. Kill yourself...