I figured out last night just how very screwed up not!Harmony is.
See, if not!Harry falls apart on her watch, then she's failed him, and thus failed in life. This gets into your classic "fear of failure" syndrome.
If she succeeds in putting him back together again, then he won't need her anymore. Which gives her a fear of success.
So I need to figure out how to break them out of this codependent cycle they're stuck in and give them an actual healthy relationship.
In other news, I've figured out how I'm going to separate not!Harmony from the others so I can have my big confrontation. And fortunately, I have Hollywood actors right here at MountainCon whose brains I can pick about the callback process. Because Google is being...rather useless on that front.