Nice job, her shoulder bends look great! Her proportions seem a bit off to me though, is she based on photos of a particular person?

The feeling I get when I look at her is that she's really tall and she's trying not to be. I think her high shoulders make it seem like she's pulling her head down, and her low boobs give her the appearance of a stoop. 

For what it's worth I compared her to a photo I found on the web, I know everyone is different though, that's why I wondered if she was based on a photo ref.

Quote - The outside of the foot looks oddly arched on the seated one on the left, but that could be the shadow...

In the second image of the thread, the dark haired girl's left foot does look a bit arched on the outside.