To me she looks to stiff to be relaxed. I thing she needs more shoulder droop, the trunk is too stiff and vertical, and her knee looks too extended. Even though she is leaning I agree with the center of mass comments from above. I know it would be very difficult, however, if she is depending on the wall for support the parts of her body in touch with the wall would be deformed (flattened). For example her left foot on the wall would like like it was going into the wall, thus no black line between the wall and the left foot. I'm also not comfortable with her right shank. Perhaps it is the lighting but it looks to me like her shank is externally rotated with respect to her thigh. perhaps consider a ground plane too.