[That's... not good. Do I have to pull her back? ...Well, first, let's try talking some sense into her, since if she's experiencing something similar to Yoshi...]

Miss Staff? Please close your eyes and try to focus. Whatever you're experiencing is... probably just a memory... Calm down and try to keep focused on here and now. Long, slow, deep breaths if you can, preferably after taking a few steps back to minimize exposure to... Whatever that fog is.