There are a few things you could have done to improve this shot, first, power down the light and open up your aperture, this will do 3 things, first it will mean your light will recycle faster and will extend the flash tube's life and it will mean less diffraction from your small aperture (unless you need the extra DOF try to remain within the lens' sweet spot).
When shooting profile view, make sure the model looks a little towards the camera side, not too much, just a tad so there is no so much of the white part of the eye showing. Also do not have her look up straight into the umbrella but rather a little below; this along with placing the umbrella a little higher will mean the specular (catch light) will be at the top of the eyes rather than straight on the pupil.
I would also place the umbrella farther behind or farther in front of the subject (relative to camera position) this will either create deeper shadows on the unlit portion of her face, or open them up some more, and will also move the specular so as to not wash out the iris.
Here is an example with similar lighting set-up. I know it's not exactly a profile, but the lighting principle is the same: note how the model is looking slightly to her right (where the camera position is) rather than straight ahead. Also note the position of the light high and behind her relative to camera position, placing the specular near her top eyelid and to the right (relative to camera) of the pupil. The light position also deepens the shadows on the unlit portion, but the large (40") umbrella allows for a nice soft transition (feathered shadow boundaries). I also used a small speedlight zoomed in to 105mm as an accent/hair light placed very high, camera left and slightly behind the model to highlight the hair and get a little extra separation.