Brun is a good role model.
I think you may be right about that, mostly. Considering her choices, how she makes them, mostly. Of course, there are some things that are difficult for her to do, but she works with them, rather than around, mostly. Isn't there an old aphorism, ``everything in moderation, including moderation,'' or something to that effect?
Hannelore, too, I think was a good role-model. Not as much moderation, but important is that she worked with her peculiarities.
Emily, too---in fact, I'm noticing a pattern here, that I also notice outside of fiction. Faye, Elliot, Renee, May, too, would be role-models, were we to know their perspectives, but we don't, so we're left with what might seem to be gratuitous lackadaisical (can't you be serious?), insecure (oh, toughen up!), impulsive (just think before you act), callous (how rude!) behaviours, which really stem from underlying conditions that---I think---are so well represented here, precisely
because they are never made obvious. That's the nature of many psychological conditions---who aren't familiar might assume a normal person, then conclude, as though they were normal, that they're somehow choosing to be that way.
A good role-model is one who, despite their situation, does what they can to improve it, irregarding whether it seems so to others.