Why does this really feel like Amane really isnt the evil one which they heavily showed but instead the old people from that island who are using Rena are the "evil" ones while shes being manipulated & somehow this is going to end with a 50/50 chance of Rena living either way Amane isnt going to be alive in the end possible sacrifice to save Rena & hmmm i'll say out of Rena ,and Nene only 1 will come back, but what bugs me about this whole situation is Renas train of though but meh. Guess one can only hope she's matured enough that her personality comes back & she can put 2 + 2 together.
to those who read this rambled abit but tis my messed up ramble of a prediction.