I just got major Bioshock flashbacks from this episode after seeing the reserve course student unflinchingly killing himself despite clearly not wanting to. The brain can be a really scary thing.
Even though Chisa's seemingly acting normally at the end of the episode I think it's pretty clear that she's no longer like she was before. Gives the "Chisa is the culprit" theory in Future arc even more weight behind it. If that's the case I'm not disappointed, if anything it just makes me pleased with myself for figuring it out before the reveal.~
Also even though it may not even be his real face, it's cool we have a face we can associate with the Ultimate Impostor now that doesn't already belong to another character.~