Board Thread:Questions and Answers/@comment-27026386-20160915122531/@comment-26004038-20160922001835

While I won't say Chisa isn't smart, she doesn't have the analytical abilities Junko has. She doesn't have Junko's capability to plan ahead of time, to know what's about to come.

Even if I don't think she has Junko's hunger/need/craving for despair, she probably would have killed either herself or Kyousuke even without the video. Just presented the command to kill someone or herself in the name of despair, she'd happily agree.

That makes me think Chisa wouldn't disguise herself as Hina. She doesn't feel the need to do it.

Also, how would she know to perfectly act like Hina? Aside from that one height misconsistensy that, if I recall correctly, never happened again, Hina's been acting perfectly like herself: she bawled over Kyouko-chan (not Kirigiri-san, not Kirigiri, not Kyouko-san, she cried over Kyouko-CHAN, and she's been calling her Kyouko-chan since episode 1), and acted completely normal to Ryota and Kyousuke (not even addressing him I think).

Chisa had never talked to Hina before Episode 1 of the Future Arc. There's no way she could act like her.

And neither Makoto or Kyouko noticed any change in Hina's behavior.