[action]
Should anything happen... [She's silent for a long time. She spends so much time worrying about losing friends, especially Ushiro, that it never occurs to her that she could disappear. As much as it upsets her, she really respects Mitsuru for bringing up such a difficult point so calmly, and it gives her a new resolve.]
You're right, this should definitely be set up so that it can continue no matter what.