Mr. Wrexham—barrister to whom contents of the story are written
Rowan Caine & Rachel Gerhardt—one of these is the narrator of the story, the most recent live-in nanny hired by the Elincourts; the other is the narrator’s former roommate, now traveling in Southeast Asia
Bill & Sandra Elincourt—Owners of a home called Heatherbrae House in Scotland, as well as partners in a design firm; they seem to have trouble retaining nannies for their daughters
Rhiannon Elincourt—14-year-old eldest daughter of the Elincourts
Maddie Elincourt—8-year-old daughter of the Elincourts
Ellie Elincourt—5-year-old daughter of the Elincourts
Petra Elincourt—18-month-old daughter of the Elincourts
Jack Grant—a driver and handyman for the Elincourts who lives on the property
Jean McKenzie—a local woman who comes in during the day to wash up, pick up, and sometimes prepare food