Bonnie’s six-year-old younger brother with big brown eyes and thick blond hair. He loves mac and cheese, strawberry ice cream, and is passionate about baseball.

The antagonist of the novel and Bonnie and Matt's biological father. He is a compulsive gambler with a diagnosed antisocial personality, and his actions contribute significantly to the novel's tension.

The caring mother of Bonnie and Matt, described as someone who loves dogs and teaches her children situational awareness. Her character contrasts with Denny's lack of care.

An elderly couple who find Bonnie and Matt's dog, Pookie, and help further the investigation by providing helpful information. They inadvertently give Bonnie hope.

The lead detective on Matt’s case, an embodiment of intuition and instinct. She plays a critical role in the investigation while forming a bond with the Sholter family, especially Bonnie.