well Holly I'm using Gleb's word ...but indeed wistfulness is a part of it to be sure. Olga is often thinking as she looks into the lens....regarding the photographer and her thoughts it seems . However it's interesting someone who knew Olga so well as Gleb did , indeed, she regularly helped him with his poetry, used that word, " sweetness" to describe her effect on one. Perhaps that is how it felt if one knew her over time as he did. ...but with the passage of time and from just looking at photographs, we see the other aspects more strongly. But certainly wistfulness is present in the whole quote from Gleb as he says he thought Olga alone could see their tragic future...
Olga was by nature a thinker and, as it later seemed to me, understood the general situation better than any member of her family, including even her parents. At least I had the impression that she had little illusions in regard to what the future held in store for them, and in consequence was often sad and worried. But there was a sweetness about her which prevented her from affecting anybody in a depressing manner, even when she herself felt depressed; she alone appeared to see clearly the tragic future." Gleb Botkin
So when people say Olga isolated herself some what near the end, I think well if so, there was a reason for that... her vision .
Oh yes, I cropped the photos because I wanted to post them side by side in a larger size than thumbnail
