Who is Aunt Pru from Haunted: A Tale of the Mediator and what is their importance?

Aunt Pru is Cee Cee's aunt. She is a psychic who reads tarot cards. When Cee Cee, Adam and Susannah visit Aunt Pru, she keeps turning up the hermit card. Susannah finds out later that this card talks about mediators, so Susannah believes that Aunt Pru had been indicating this with the turning of this card.