Teddy Maxwell, initially presented as a five-year-old boy, is the child Mallory is hired to care for. Teddy's creativity and imagination charm those around him, and his experiences unravel key elements of the story.

Caroline Maxwell is a doctor in the Maxwell household who initially appears supportive of Mallory. Her character unfolds to show a more complex and darker side as the narrative progresses.

Ted Maxwell is Caroline's husband and presents himself as a man of reason. His role is intertwined with both Mallory's employment and the larger mystery surrounding the Maxwell family.

Mitzi is the neighbor of the Maxwells. She is open-minded about the supernatural and provides Mallory with crucial information about the Maxwells' history and the cottage.

Russell is Mallory’s sponsor and provides support and guidance for her recovery journey. He is a stabilizing influence and connects Mallory to the job with the Maxwells.

Adrian is Mallory’s love interest, who stands by her side and offers support and hope. His relationship with Mallory provides a contrast to her familial estrangement.