Margaret Atwood has praised Sharp as a character, writing how she "makes no pretensions to goodness. She is wicked, she enjoys being wicked, and she does it out of vanity and her own profit, tricking and deluding English society in the process". She compares Sharp to Edith Wharton's Undine Spragg in The Custom of the Country: both live on their wits "and use men as ambulatory bank accounts", although the latter did not have the spirit or sense of humour that Sharp is portrayed with. More personally, suggests Henkle, to Thackeray himself she represented the power of the artist and the writer, in how she overcomes obstacles to achieve her aims. Her entire career, says F. M. Salter, is "one supreme irony", and Patricia Marks suggests that Becky, although a rounded character, remains "nothing without her finery", and compared with her, the other characters appear "tattered".
