Descended from Celtic goddesses and the fairies of folklore, the literary character of Morgan le Fay has been most commonly perceived as a witch and a one-dimensional villainess who plagues King Arthur and his court, rather than recognized as the legendary King’s enchanted healer and otherworldly guardian. Too often the complexity of Morgan le Fay and her supernatural abilities are lost, her character neglected as peripheral. As a literary figure of imaginative design this thesis explores Morgan le Fay as a unique “window” into the medieval mindset, whereby one can recover both medieval understandings of magic and female magicians. By analyzing her role in key sources from the twelfth to fifteenth century, this thesis uses Morgan le Fay to recover nuanced perceptions of the supernatural in medieval England that embraced the ambiguity of a pagan past and remained insulated from continental constructions of demonic witchcraft.