Barbara> He might very well be blinded by beauty when it's combined with an artful ability to ingratiate oneself by any possible means.

Elinor, on the other hand, gives Lucy the benefit of the doubt for having been much less artful at first.

Ch23> the four succeeding years ..., spent on her side in inferior society and more frivolous pursuits, had perhaps robbed her of that simplicity, which might once have given an interesting character to her beauty.