A 30-year-old architect who believes in traditional family roles and domesticity, presenting as a modern "Prince Charming" but holding patriarchal expectations that influence his relationship with Harriet.

The family's fifth child, whose physical appearance and behavior disrupt the family's idealism and reflect themes of otherness and societal fear of the unknown.

Harriet's widowed mother, who supports her grandchildren while offering a practical and balanced perspective contrasting with Harriet’s idealism.

The couple’s first four children, who embody the Lovatt family’s initial vision of a perfect family and highlight the contrast with their brother Ben.

David’s mother and stepfather, representing upper-middle-class complacency and elitism, who critique and influence decisions about Ben.

David’s stepmother and father, representing cosmopolitanism and wealth, whose financial support enables Harriet and David’s lifestyle.

Figures of medical and educational authority who represent societal challenges in addressing Ben’s condition and influence Harriet’s perceptions.

A young man who helps with yard work and becomes Ben’s friend, offering the support and acceptance Ben lacks at home.

A group of boys Ben befriends at school, representing societal perceptions of youth as threats and exploring themes of alienation and otherness.