Chapter one opens and provides a prime example of Mrs. Bennet's character, she is anxious. "Mr. Bennet, how can you abuse your own children in such way? You take delight in vexing me. You have no compassion on my poor nerves.'' Mr. Bennet takes delight in "vexing" his wife, it is not a very difficult thing to do!
Chapter 9 reveals that Mrs. Bennet is both profuse in her conversation and oblivious to the restraints necessary in the practice of social decorum. “I do not like to boast of my own child, but, to be sure, Jane—one does not often see anybody better-looking. It is what everybody says. I do not trust my own partiality. When she was only fifteen there was a gentleman at my brother Gardiner's, in town, so much in love with her that my sister-in-law was sure he would make her an offer before we came away. But, however, he did not. Perhaps he thought her too young. However, he wrote some verses on her, and very pretty they were.”
Jane Bennet is beautiful (as indicated by the quote above) and sweet, as Mrs. Bennet describes to her neighbors at Netherfield in chapter 9, “for [Jane] has, without exception, the sweetest temper I ever met with."
She is complying, as her father points out in chapter 55 as he describes the life that Mr. Bingley and Jane will lead together. "You are each of you so complying, that nothing will ever be resolved on; so easy, that every servant will cheat you; and so generous, that you will always exceed your income.''