Proposed Canon
Blair was a Caster and the Overlady of the Side of Westeregg. Her Sister, Bell, led the Side of Easteros. She was part of a Tribe of green skinned men and was attuned to The Arkendish. She was said to have been the most powerful ruler in the land, but this didn't save her from being croaked by Judy Gale.
 Real World References
West, Witch, Wicked, need I say more?
Presumably a campaign to defeat her would be known as some kind of Blair the Witch Project, too.
|Ruler of Westeregg||Succeeded by:|
None, Side destroyed