Assessors and teachers generally prefer students to avoid doing "character" themed body paragraphs in the exam and instead explore a particular theme or an idea in which you can then refer to the characters as your examples and evidence.
I haven't done the essay topic, but a central idea you could talk about in one of your body paragraphs is how women in the theatre must sacrifice their own "human" qualities (like femininity) to succeed as they are consumed by their own ambition in pursuing glory and stardom. Most prominent example is through Eve's actions. You could also relate to the sacrifice of their own personal identity in order to become a different "persona"; someone significant and standout as they themselves are not. The latter you can make links to the characteristics of the theater environment. Lastly, also talk about the actual women's role or more specifically their influence in the theater world where in most cases especially through Eve; they are reliant on the authority of men in order to promote their stardom.
This is just my take on it so feel free to disagree and have a counter-point

This is a good thing because you are forming your own interpretations of the film.