At some point, Sephiroth and Ashe need to sit and he needs to be made talk about the Calamity.

Not only because he saw the aftermath of her vision in his own, but considering somewhere in Sephiroth's timeline there is the fact that he does eventually become the equivalent of the same in his own world - AND he knows it.

I think Genesis might have mentioned it to Ashe before as well? Now that Genesis isn't here it might encourage her to pick at him about it? IDK just throwing ideas out there...