Indeed - portrait is the main purpose; ballerina is her topmost "attribute". I specifically asked her to avoid make-up, as standard ballerina makeup is meant to enhance facial features for distant viewers. I however dislike the raccoon look on close-ups. So the makeup was limited to some foundation on nose and forehead, to avoid them shining.
I may consider +/- brown lipstick next time: this is because I like to "push" the red channel brigthness, so as to attenuate minor skin blemishes or irregularities. In such case, lips become unnaturally bright or (even worse) "disappear". See the first pic for instance. Not ugly, but unnatural.
I agree that the outfit & accessories are not those of classical ballet performance, but that aspect has been fully covered by her father, an excellent photographer (amateur, but publishing in ballet-specific magazines). I do not dare to compete. Leotard only was her choice, by the way. In class she would generally wear tights in addition, as well as flats, but not always.
The collected pics above are not a "series", but elements of a more complex arrangement illustrating her "dimensions" or passions. The first three will be re-arranged to illustrate her ballerina side. The nude shot has a different purpose that will become apparent, I hope, when associated with two more shots (being processed)