I'm thinking that it will happen after the war. Yuffie wants to talk to Lydia too. Maybe if your up for something for the two of them? If not Yuffie will just send her a letter. She's going to want to convince Lydia to leave and tell her a very painful story as to why. If Lydia doesn't want to leave she wants to give her special training that she thinks that she'll need. Training that she doesn't think anyone else will cover because its something easily over looked.

Which is how to kill another human without hesitating.

There is a long reason that does with old game CR which is why Yuffie takes it to heart and I think it would be an interesting dynamic to explore and it would be Yuffie REALLY opening up about it which would be a first for her. Plus she wants that present so before big fight is best :3 Let me know what you wanna do. If Lydia wants to stay during the conflict then Yuffie's cool with that but she wants to talk to her and they haven't had a thread for awhile. Idk if you wanted to do it in a log with the two of the or a letter? let me know because it's whatever you got time for.

It will definitely open up their friendship more too.