Through the focus of Anne and who values her and who doesn't, it's interesting to note that she was the first object of Charles Musgrove's affections at 22, and indeed he still values her steady presence when she is at Uppercross later, even though she refused him:

"No second attachment, the only thoroughly natural, happy, and sufficient cure, at her (Anne's) time of life, had been possible to the nice tone of her mind, the fastidiousness of her taste, in the small limits of the society around them. ***She had been solicited, when about two-and-twenty, to change her name by the young man who not long afterwards found a more willing mind in her younger sister***: and **Lady Russell had lamented her refusal***; for Charles Musgrove was the eldest son of a man whose landed property and ***general importance were second in that country only to Sir Walter's***, and of good character and appearance; and however Lady Russell might have asked yet for something more, while Anne was nineteen she would have rejoiced to see her at twenty-two so respectably removed from the partialities and injustice of her father's house, ***and settled so permanently near herself***. But in this case Anne had left nothing for advice to do; and though Lady Russell, ***as satisfied as ever with her own discretion***, never wished the past undone, she began now to have the anxiety which borders on hopelessness for Anne's being tempted, by some man of talents and independence, to enter a state for which she held her to be peculiarly fitted by her warm affections and domestic habits."

The effects of this refusal by Anne are different, than when Lady Russell last advised her. Anne has no regrets. It's interesting that Charles favoured Anne above Mary, so she still must've had some attributes and was not completely without prospects, as the Elliot opinion sometimes says. Further of interest is Lady Russell's desire of Anne being settled so near her. If she had married the Captain, chances are she would lose her.