How does Austen create her characters in Chapter 11?

Austen is very unique in her creation of characters in Pride and Prejudice, as she uses very minimal physical descriptions. Even then she only does it to highlight another factor of the character, as the main focus of Austens characters is their moral qualities (if they have any.)
In Chapter 11, the first paragraph is the narrator's opinion on Miss Hirst and Miss Bingley, however, it seems that Elizabeth's opinion is entwined into the narration. Elizabeth seems to be the centre of conciousness in Pride and Prejudice for this reason.
Miss Bingleys attention switches from Elizabeth to Mr Darcy as soon as he enters the room, which shows how fickle she is and also the theme of Chapter 11 (Miss Bingley will constantly try and get Darcys attention and attempt to make him fall in love with her.) This is also shown by the fact she mimics his opinion on the dances, in an attempt to create a connection between the two of them.
Also, when the three men enter, Austen uses what they say to build their characters, as Mr Hurst was 'very glad' and Mr Darcy offered 'polite congratulations' to Elizabeth, which shows their possible cold personalities. Then Mr Bingley offers 'polite congratulations' but warmer, which further shows he is a more reliable, positive character in Pride and Prejudice.
Miss Bingley constantly mimics Mr Darcy, for example, she picks up volume 2 of a book Mr Darcy is reading, even though she hasn't read the first volume. It then says about her gaining 'obtained private intelligence,' which shows she has planned to secure Mr Darcy as a husband and that is her sole purpose (which is parallel to Mrs Bennets goal for her daughters.) She constantly tries to attract his attention (when she is reading, she has no interest in the book,) which shows her personality and that she is an ingenuine character.
Chapter 11 shows Mr Darcys feelings towards Elizabeth, beginning with the contrast between how he looks at Miss Bingley (he's not bothered and doesn't even look up) and Elizabeth (unconciously closes his book, which shows his unintentional feelings towards her.) Also, Elizabeth and Miss Bingley are further contrasted by the fact that Elizabeth teases Mr Darcy and doesn't like him at this point, whereas Miss Bingley wants to go to him and not disappoint him. 
The connection between Mr Darcy and Elizabeth is shown when they are bickering, as there is no mention of who is speaking, which shows how strong their connection is as you don't need to say who is speaking, as you already know instinctively. Miss Bingley is not happy at this because she has to attempt to create the connection between herself and Mr Darcy, and Elizabeth has a natural connection with him, even though she doesn't like him. This could show Miss Bingley to be a revengeful character later in the book. The narrator then notes that Miss Bingley is 'tired of the conversation.'