Who is Hannah in the novel, The Face on the Milk Carton?

Though she never appears in the present day scene, Hannah plays an integral role in the novel. She is the daughter of Frank and Miranda Johnson (formerly Javensen) who brought Janie to them to live. Hannah ran away from her parents when she was sixteen years old to join the cult of the Hare Krishnas. She married a man in the cult and later tried to escape. It is presumed that Hannah found Janie in an ice cream parlor in a shopping mall, kidnapped her, and then brought her to the Johnsons as her own daughter. Hannah decided to return to the cult and left Janie to be raised by her parents. The Johnsons were forced to cut off communication with her and it is unknown where Hannah is or even if she is still alive.