 She is "The Lady of Shadows", the second companion predicted by Walter to be drawn into Roland's world via the mysterious doors.Initially, her dominant personality is that of Odetta Susannah Holmes, a well-mannered but priggish woman active in the civil rights movement.At times, however, she is taken over by Detta Susannah Walker—murderously psychotic, incredibly crafty, completely unbreakable—whom neither Eddie nor Roland can control.