A Miss De Bourgh is introduced as a sickly girl with "neither figure nor face" who was "pale and sickly" and she rarely spoke, unlike her mother who spoke nearly constantly.
Also, Mr. Darcy was expected for a course of weeks. He brought with him Colonel Fitzwilliam, a cousin of his, who, although plain looking, was obviously a gentleman. Austen, at this point says that he had "the readiness and ease of a well-bred man, and talked very pleasantly". Lady Catherine's character is again demonstrated when she breaks into a conversation of Colonel Fitzwilliam and Elizabeth by saying,
"What is it you are saying, Fitzwilliam? What is it you are talking of? What are you telling Miss Bennett? Let me hear what it is."
This again shows how 'ill-bred' Lady Catherine is. Later on, Miss Elizabeth plays the piano in a separate room and Colonel sits beside her and Mr. Darcy stands listening. When Elizabeth and the gentlemen begin conversing, there is a more comfortable tone then when Elizabeth had before spoken with Mr. Darcy. This is an example of overshadowing.
