Hi @Liz140,
I do think the "zen-like" listing may attract people who lack peace in their own selves and are looking to find it with you...not your job! I notice that she was specializing in "trauma" counseling so she might have needed extra de-stressing. Also the price is low enough that people can afford to hang out for long stays. Your photos have lots of reassuring zen-things which may attract "lost souls" although the red bedspread etc. seems to be more fire than ice! That said, you're a superhost (congrats!) and have tons of great reviews and I wouldn't worry about the impact of one or two.
I looked at her reviews and indeed, while many liked her, there were others who didn't get on with her. You might download the "AirReview" extension for Chrome which enables you to see not only reviews OF her by guests, but also reviews BY her of her hosts. You might pick up a red flag or two there, which would be particularly useful for a long term guest - I'd be wary of them although in this slow season (In Boston), I'd welcome a longer term guest about now! Although if you're on IB, I'm not sure how useful it would be to know more about them. I couldn't figure out what your length of stay was but I'd limit it to no more than a month - mine is set at 29 days. Maybe 2 weeks and then you can reevaluate if it's' going well.... Good luck!