I'm game to try it out if you see them working out that way? She'd be there for him as much as he'd allow her to be and would even attempt to help him if at all possible. I don't think she would be afraid of him ever, but she would also know when to push buttons and when to back off.
Even while he was in boot camp she would write him from time to time but still move on with her life if he had told her too. I can see her still wanting to be his friend but old habits die hard and she's right there again when she's needed or he has an episode?