Cathy’s older brother who is 14 at the story's start, aspiring to be a doctor, and taking on an educational role with his younger siblings while they are confined.

The mother of the children, who, after being disinherited, returns to live with her wealthy parents with her children, maintaining a focus on reclaiming her inheritance.

The children's father, a tall and handsome man who experienced hardship after being disowned for marrying Corrine, reflecting a charm and warmth admired by Cathy.

Cathy's twin sister, characterized by her doll-like appearance and outgoing nature, whose time in confinement adversely affects her development and health.

Carrie's quieter and more delicate twin brother, who shares a close bond with his sister and develops a musical inclination while confined.

Corrine’s mother, a stern and imposing figure who enforces strict religious and moral rules on the children during their confinement.

Corrine's father, a wealthy and controlling patriarch who initially disowns Corrine after her marriage and sets the terms for her to regain his favor.

A young and charming man who becomes significant to Corrine's life during the children's confinement, representing outside possibilities and relationships.