The wife of Lady Susan’s brother-in-law, who is suspicious of Lady Susan’s motives and becomes a maternal figure to Susan’s daughter, Frederica, while navigating social dynamics and familial tensions.

Lady Susan’s 16-year-old daughter, who is portrayed as timid and shy by some, yet finds ways to assert her desires and navigate the challenges posed by her mother’s ambitions and social manipulations.

Catherine’s younger brother, a handsome and earnest young man who becomes ensnared by Lady Susan's allure, leading to complications in his perceptions and relationships.

Lady Susan’s close friend confined by an unhappy marriage, secretly plotting and longing for freedom from her husband to partake in societal intrigues.

Lady Susan’s brother-in-law and Catherine’s husband, who is good-natured and largely oblivious to the intrigues between the women in his life, maintaining a supportive yet passive role within the family dynamics.