I'm really hoping that the next novel will clear out when did Aerith begin to see the whispers. Did she already see them when she was a kid? Or did she begin to see them after a while? When she had visions about her drawing in the Shinra tower, or when they stopped (caused by the whispers)? If we think about it, pretty logically, there must be an event that started it all, especially since Nomura is a bit of an arse with it, we can guess that it's an information that is important AND going to be released, either in a novel, either in game (or both). That's really something that makes me think... just how much did they have an impact on her life up until now? I'm reminded of her words, how she loses herself in a maze, and I still wonder if that's like... the Lifestream flow of information (from far back in the past to far away in the future), there is so much and she doesn't know where to look, only the flowers can guide her since she is the last of the Cetras but hasn't been taught by Ilfana. I feel that this speech in chapter 17 is the key to understand it all.
And
@eleamaya yes, Maximilian mentioned Laguna's story as a parallel. I do think that the start of FFVII/Remake is basically the time when they get separated, only to get reunited by death. Their love is tragic like that. Before that they 'could' be reunited (technically, one being alive didn't mean the other could only be dead, even if the events prevented them to get reunited), but once FFVII's story kicks in, there is no way that they can be both alive at the same time. And to sum it up, I do think that they're both up to die *again*, to the fans' great dismay. And yet, if one could save Aerith, that would be Zack - but this is something that cannot happen. It's the whole tragedy of that pair. Prepare your handkerchieves.