What is the importance of Elizabeth Bennet in Pride and Prejudice?

Looking at how Austen uses Elizabeth Bennet to question society's definitions of propriety, female accomplishment, social values on marriage, and suggest a vision for mutual companionship and compatability. Also looking at the Bildungsroman structure and how Elizabeth's realisation of her own pride and prejudice lead to her development and maturation. For GCSE English Literature, Pride and Prejudice.