Nimue

Nimue is the Lady of the Lake, also called the "Lady of the Lake Waters". A powerful sorceress, the heroine of the legends about King Arthur, Nimue was a student of Merlin (and later, according to rumors, killed the teacher), raised Sir Lancelot and created the sword Excalibur. Also, Nimue, among the "mysterious queens", took the mortally wounded Arthur to the island of Avalon.