Nina is a central character and the second narrator in *The Housemaid*. In her late thirties, she is married to Andrew and has a nine-year-old daughter, Cecelia. Nina appears to be a wealthy housewife with a volatile nature and treats Millie poorly, but her behavior is part of a larger strategy to escape her situation with Andrew.

Andrew is Nina's husband and Millie's lover in *The Housemaid*. He is initially depicted as a henpecked husband in a loveless marriage with Nina but ultimately becomes the story's primary antagonist. Andrew’s actions are heavily influenced by his childhood experiences and struggles for power and perfection.

Cecelia is Nina's nine-year-old daughter in *The Housemaid*. Andrew is not her biological father, but he has been her only father figure. Cecelia's peculiar behavior is rooted in past trauma and Nina’s absences. She is fearful of Andrew and becomes happier once she is away from him.

Enzo is the Winchesters’ landscaper in *The Housemaid*. Hailing from Sicily, he is attractive and often pretends not to speak fluent English to avoid unwanted attention. He sympathizes with Nina due to his past experiences and is willing to help Nina and Cecelia escape from Andrew.