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Viviane is "The Lady of the Lake," the magical priestess of the Isle of Avalon, a special mist-shrouded place which becomes more difficult to reach as people turn away from its nature- and Goddess-oriented religion. Viviane's quest is to find a king who will be loyal to Avalon as well as to Christianity. This king will be Arthur. Viviane's power is significantly strong. It is that power which inevitably drives all those who love Viviane away from her. She must use her power to do the work of the Goddess, which is not always understood. Morgaine, who is raised by Viviane feels the power being used on her and leaves, as well as Viviane's son, Lancelet, who is to afraid of his mother to see her. Viviane is a strong character who's spirituality is thought provoking. .
Gwenhwyfar, Arthur's Queen, is an overly pious, fearful woman who successfully sways her husband, Arthur, into betraying his allegiance to Avalon. Arthur's incredible love for Gwenyfar is confusing at times because there is no real development of their relationship. Arthur just seems to have fallen deeply in love with a woman who's stupidity is infuriating. However, Arthur is not the only one who is madly in love with Gwenyfar; Arthur's best friend Lancelet is as well. Igraine see's this in the beginning and tries to undo the arrangement of her marriage to Arthur, but it could not be stopped. Gwenyfar returns the love to Lancelet and the reader somehow manages to feel compassion for the poor woman locked in a triangle of despair. The reader grows to hate Gwenyfar as she is the ultimate rock in the bottom of Morgaine's shoe. The Mists of Avalon depicts Gwenhwyfar as a blind cultist, rather than the wise and loving queen. .
Set against Gwenyfar is Morgaine of the Fairies, Arthur's sister, love, and enemy - and the most powerfully believable person in the book - who manipulates the characters like threads in a tapestry to achieve her tragic and heroic goals.