Age
This is unknown, though she is the same generation as Fitzwilliam Darcy so it is likely that she is in her 20s.
Family and Situation
Anne de Bourgh is the daughter of Sir Lewis de Bourgh and the Rt. Hon. Lady Catherine de Bourgh. This, in turn, makes her the first cousin of the Eldest son of the Earl of -------, Colonel Fitzwilliam, Georgiana Darcy and Fitzwilliam Darcy, whom she is expected to marry by her mother.
Anne de Bough is presented as the heir to Rosings Park and its “extensive property,” though why the estate would have defaulted to her mother and not her upon Sir Lewis' death unexplained (it may be, in fact, that Anne has technically already inherited Rosings and that her mother oversees it on her behalf).
Other Connections
Her companion Mrs. Jenkinson has supervised her education and remained with the family, likely preventing Anne from forming close relationships with any women her own age. We do know that she’s never been presented at court because she is too sickly and that she often drives by Mr. Collins’ house “with her little phaeton and ponies,” though there is no mention of her ever going inside.
Appearance
Mr. Collins tells us that “Lady Catherine herself says that, in point of true beauty, Miss de Bourgh is far superior to the handsomest of her sex, because there is that in her features which marks the young lady of distinguished birth,” which one might take to mean she has classic British aristocratic features.
We are told repeatedly that Miss de Bourgh is of a sickly disposition. Maria Lucas describes her as “thin and small” while Elizabeth thinks she looks “sicky and cross.” The narrator tells us that she looks little like her mother and that “Miss de Bourgh was pale and sickly; her features, though not plain, were insignificant; and she spoke very little, except in a low voice, to Mrs. Jenkinson”.
Character
Anne de Bourgh does not receive a single line of dialogue in the novel, though she is present in a number of scenes. From this, the reader is left to extrapolate that she either does not have much personality or is completely overpowered by her mother. In either case, this puts her in stark contrast to Elizabeth Bennet, whom Darcy clearly prefers.
