Graea

Graea (グレーア Gurēa) is a medusa-like creature and Dark Mage who is the Guild Master of Sieg: a Guild located in Warsfeil; she is known as Kinemon Brook's mortal enemy.

Magic and Abilities
 (石化眼 Sutōn Aisu): Graea, fitting with her medusa theme; has the ability to turn anyone who looks directly into the her eyes into stone. Over time, those who have been turned to stone will turn to dust; whenever this magic is active, her eyes glow yellow and become swirled. The Magic also doesn't work on people who wear glasses.

Trivia

 * Her name is a pun on graeae, who were the three sisters of the gorgon Medusa; whom her design is based on.