Quite the opposite of her younger sister, Monica is an assertive, straightforward, and unpredictable young woman who tends to speak her mind without concern for how others might perceive her words. Unlike many women of her social standing and upbringing, she exhibits a more masculine demeanor: skilled in horseback riding, she rides astride rather than sidesaddle; she walks around in a top hat and carries a cane, making it clear that she is far from the conventional lady.
Monica is married to Frederick Mildrake, a man who is clueless and naive. She does not have genuine feelings for him but chose to marry him because he was more passionate than her other suitors. Despite her self-centered attitude, Monica has a softer side that she usually reserves for her younger sister, whom she fiercely protects.
Monica develops a strong dislike for William after learning he is a potential suitor for Eleanor. She believes William is not right for Eleanor, as he fails to value her as much as Monica does. Additionally, Monica thinks William's ultimate goal is to profit from the marriage, which she finds shameless and insulting to both Eleanor and the Campbell family.
After witnessing William's proposal to Eleanor, Monica becomes distressed and decides to embark on a trip to India. During her journey, she grows fond of traditional Indian clothing and accessories. Even after returning to England, she continues to wear saris and various adornments like bracelets, armlets, and earrings. Her father insists that she should move out if she wishes to keep wearing such attire. It also becomes evident that Monica harbors a particular aversion towards her father, who openly engages in affairs with multiple women.
