I think you have mastered the lighting and camera controls brilliantly but with this model you have missed the mark for the poses by quite some margin.
Both the first and third shots make it look like she is all twisted and they are very unnatural. In the first one it looks to me like she is suffering from stomach ache while her arms are distracting. Her facial expression as says to me that she had not settled in properly at this point of the shoot, she almost looks startled.
Compared to your other models I am guessing that this young lady (with her being new) was far harder to control and make feel comfortable in front of the camera. That is apparent in the shots for me.
I think if you shoot with her again you will probably get better results as she will be more relaxed and more confident as well. Those results should, i hope be worlds apart from these
