I know this is a 2 months old message but what is the big Celica scene? I made sure to do that encounter with her as my partner and she wasn't involved at all?
She has a few comments on some of the routes, and depending on your choices near the end she may take matters into her own hands with the boss in an extra moment that gets referenced later in camp. It sounds like it might be easier to miss them than I realized, though.