Susannah Simon is a 16-year-old girl that attends Junipero Serra Mission Academy in Carmel, California. Susannah is the only daughter of her mother and biological father. Her biological father is deceased. He died when was six, but his ghost still appears to Suze on occasion. Her mother is remarried to a man, Andy Ackerman, who has three sons and so Susannah now has three new stepbrothers.
Susannah is a mediator. A mediator is someone that sees and talks to ghosts to help them make the transition from their life on earth to wherever it is they go when they die. Her ability is a secret. The only person that knows about it is the priest and principal of her school, Father Dominic, who is also a mediator. The only other person that knows is an eight-year-old boy, Jack Slater, that Suze discovers is a mediator too.
Susannah lived in Brooklyn, New York prior to moving to Carmel with her mother. In Brooklyn, Susannah's best friend is Gina. Since she is new to Carmel, Susannah is still building her social circle of friends, but she does have two new best friends, Cee Cee and Adam McTavish.
