Viviane
Viviane is the older sister of Igraine and Morgause. She is a priestess and carries the prestigious title of the Lady of Avalon. Although she is born in Avalon, she was fostered on the Druid Isle, far to the north, in the Islands. Although she and Igraine have the same mother, Viviane's father is a priest who was "overshadowed by the power of the God;" therefore, she does not have a father. She is a charming and manipulative woman. When she makes her first entrance in the story, her manipulative side is evident as she tells Igraine that her entire future is about to change.
As Morgaine gets older, Viviane discovers that she possesses the Sight, so Viviane wants to take Morgaine to Avalon to learn the ways of the priestess. Viviane takes Morgaine to Avalon and lays the foundation for her future. It is through her manipulation that Morgaine ends up sleeping with Arthur and bearing a son from that union. Viviane does whatever is necessary to defend Avalon and will not let anything get in that way, even when it causes her own death.
As Morgaine gets older, Viviane discovers that she possesses the Sight, so Viviane wants to take Morgaine to Avalon to learn the ways of the priestess. Viviane takes Morgaine to Avalon and lays the foundation for her future. It is through her manipulation that Morgaine ends up sleeping with Arthur and bearing a son from that union. Viviane does whatever is necessary to defend Avalon and will not let anything get in that way, even when it causes her own death.