·       Elle Portman: The protagonist of the novel, a single mother who is struggling to come to terms with the death of her 2-year-old son in a mass shooting. She is a kind and compassionate woman who is determined to find the person responsible for her son's death. She is also a bit of a loner who is not afraid to stand up for what she believes in.

·       Calder Hudson: A high-powered, corporate consultant. He is a handsome and charismatic man who is determined to help Elle find the person responsible for her son's death. He is also a bit of a mystery man who is not afraid to bend the rules to get what he wants.

·       Eleanor Portman: Elle's mother, a kind and compassionate woman who is determined to help her daughter through her grief. She is also a bit of a worrywart who is always looking out for Elle.

·       The Shooter: The mysterious person responsible for the mass shooting that killed Elle's son. He is a sadistic and cruel man who is not afraid to kill innocent people. He is also a bit of a coward who is not afraid to hide behind a mask.