Tricia is the book’s protagonist and main character. It is through her perspective that most of the story is told. Tricia’s voice also sets the tone of the book. She creates a sense of anxiety with her convictions that there is a third person in the house along with her and Ethan. She also heightens the reader’s worry and suspicion through her speculation that “[s]omething terrible has happened in this house” (13). Tricia’s voice is the one the reader comes to rely on to not only set the mood but also drive the action, since it is through Tricia that the reader encounters the tape recordings.

Tricia first comes across as subservient and meek, a follower to Ethan’s leader. The reader therefore develops concern and empathy for her and trusts her voice as the book opens. Tricia loves it when her husband takes the lead and likes to put him on a “white knight” pedestal. Take these words, for instance: “‘Thank you.’ I smile at him, giddy with affection for my strong, handsome husband.