I recently read a description of Mr. Darcy as a rescuer, and that gave me a little pause. Since he wants no notice of his heroic deeds, it is easy to underestimate this part of his personality. But he does seem to be a rescuer, and usually unbidden.
He rescues Georgiana’s virtue from the clutches of Wickham and rescues the Bennet’s reputation and respectability by forcing Wickham to marry Lydia. In both cases, he is unbidden but very welcomed.
There are a lot of positive personality traits associated with someone who comes to the aid of others. Loyalty. Selflessness. Generosity. Responsibility. Tolerance. Darcy has many of these traits (perhaps tolerance to a lesser degree, though), and that is why he is so appealing to Elizabeth and to readers.
Yet, he also “rescues” Bingley from association with Jane and the Bennet family by whisking him off to London. In this case, his interference is both unbidden and unappreciated by Bingley (although Caroline appreciates it to a great degree!).
But there can also be downsides to rescuing personality. It could be construed as, “you need me,” or “I know what’s best for you.” These modern psychological concepts are a little difficult to apply to Regency England, where being both male and wealthy inherently gives you power and dominion over others. Nonetheless, I think these elements are interesting traits in Darcy’s personality.
Does a person like Darcy who rescues others feel burdened? Get exhausted from exerting so much energy for others? Become resentful that no one else can behave responsibly?