Mary seems to be interested in him.

Mrs. Bennet wished to understand ... that he thought of paying his addresses to one of her younger girls, and Mary might have been prevailed on to accept him. She rated his abilities much higher than any of the others; there was a solidity in his reflections which often struck her, and though by no means so clever as herself, she thought that if encouraged to read and improve himself by such an example as hers, he might become a very agreeable companion. But on the following morning, every hope of this kind was done away. Miss Lucas called soon after breakfast, and in a private conference with Elizabeth related the event of the day before. (Ch. 22)

It's curious that in Ch. 23, JA tells Mrs. and Mr. Bennet (and Lizzy) opinions about Charlotte wedding, and also Jane's and
even Kitty and Lidia's, but she doesn't say what Mary thought.

I find this amusing