Characters in The Housemaid Is Watching

Wilhelmina "Millie" Calloway

The former housemaid, now a suburban social worker, wife, and mother, who investigates her neighbors.

Also in The Housemaid, The Housemaid's Secret, The Housemaid's Wedding

Enzo Accardi

Millie's husband.

Also in The Housemaid, The Housemaid's Wedding

Suzette Lowell

A neighbor on the cul-de-sac whose household employs a housemaid.

Jonathan Lowell

Suzette’s husband and a neighbor on the cul-de-sac.

Martha (The Housemaid Is Watching)

The Lowells' housemaid on the cul-de-sac; central to one of the book's major twists.