A human who attends the magical academy in the city-state of Ariadne and is training to be a mage knight, and Emily Sevensheep's partner. Beatrix is most likely one of the 67 million residents of the Magical World who is pure human (and hence can be saved by Kurt Godel's plan), as seen when her magic is able to do damage to the demons that attacked Negi's crew during the party held by Godel.

(Source: Negima! Wikia)