Селістія Ралґріс

Celistia Ralgris is the Third Year knight leader of the “Knight Squadron”. She was said to be the strongest of the Academy. She's a young woman of the Duke House, one of the four Great Nobles, and she's famous for being a man-hater.

She is user of the Divine Drag-Ride "Lindworm."

(Source: Saijaku Muhai no Bahamut Wikia)