Ellen Mira Mathers

Ellen Mira Mathers is the secondary antagonist of the light novel and anime series Date A Live. She was introduced as the one of the main antagonists in Date A Live II, and the main protagonist in Date A Live Encore 2: Ellen Mathers's Strongest Day. She is also called The World's Strongest Wizard and Adeptus 1. She was the secretary of Deus.Ex.Machina Industries's director Isaac Ray Peram Westcott, one of the company's Chief Executives. One year after Westcott's demise, She become the new Raizen High School physics teacher after lost her memories involving with Westcott and DEM Industry permanently.

She is voiced by Shizuka Ito in the Japanese version of the anime, and Trina Nishimura in the English dubbed version, both of whom also voice Benitsubasa.