I'm confused about how you talk to Christa because she's always with ymir
Try sleeping with her/going to sleep in your own bed late at night. She told u what to do but you just skipped the whole thing apparently
everytime I try to wait till late at night nothing happens
Sleep when it's night, not just wait. Or click on her sleeping, you'll have two options. Try both.
I tried both but neither worked for some reason and she is the character I need to progress
