On reaching the spacious lobby above they were shown into a very pretty sitting-room, lately fitted up with greater elegance and lightness than the apartments below; and were informed that it was but just done to give pleasure to Miss Darcy, who had taken a liking to the room when last at Pemberley.
"He is certainly a good brother," said Elizabeth, as she walked towards one of the windows.

– Jane Austen

Pride and Prejudice, Chapter 43. Family is important to Darcy and he is a good and caring brother, Elizabeth discovers when she is taken into an attractive sitting room. His sister Georgiana took a liking to the room when she last visited Pemberley, so Darcy had it more elegantly fitted out for her pleasure.