Reah of the Coos. A character from the Stephen King series The Dark Tower. An evil, wretched witch to be sure. Perhaps a vampire? She has fed on human blood after all. The spiteful thing wears her beloved companion, Ermot, a venomous snake, around her neck. She had stitched it back together after Roland shot it out of a tree. Out for revenge, she was responsible for the death of Roland's one true love, Susan Delgado and his mother, Gabrielle Deschain.