In M.C. Beaton's series featuring Agatha Raisin, the protagonist is portrayed as lacking the charm necessary for effective public relations. This absence of charm complicates her interactions with others, making it challenging for her to navigate social situations and build relationships. Agatha's character often stumbles in her attempts at being likable, leading to amusing and awkward scenarios.

The series, particularly in "Agatha Raisin and the Quiche of Death," highlights the importance of charm in personal and professional interactions. Agatha's struggles underscore a central theme in the stories: the balance between her determination and her social shortcomings, which often results in humorous predicaments and an engaging narrative.