Joanne Cook was a woman who became close to Kensdale Public Library librarian Kate Park. Following the disappearance of her younger brother, Jordan Cook, she found the library to be her only place of safety. She knew about Kate's occult research and too believed there was something evil surrounding Amanda the Adventurer. Following Kate's death, Joanne brought her nibling Riley Park to the library to destroy the Amanda the Adventurer tapes and find a way to stop Hameln Entertainment. Before she and Riley could leave, Joanne was killed by a demonic entity attracted to the tapes.