I like to think that maybe Charlotte and Anne de Bourgh would strike up a friendship:

"From the drawing-room they could distinguish nothing in the lane, and were indebted to Mr. Collins for the knowledge of what carriages went along, and how often especially Miss De Bourgh drove by in her phaeton, which he never failed coming to inform them of, though it happened almost every day. She not unfrequently stopped at the Parsonage, and had a few minutes' conversation with Charlotte, but was scarcely ever prevailed on to get out."

As we know almost nothing about Anne's personality and intellect, she may well turn out to provide Charlotte with intelligent and stimulating conversations once they get to know each other.