The White Queen
Emma is the second most powerful telepath in the world only to Charles. She defected from the Hellfire club after finding out they were abusing mutants for their own free will.
Several staff do not trust her, however her students refused to enroll without her receiving a position on the staff.
She is a leader In the Acolytes, preparing X-Men to combat a war against humans that she believes Magneto accurately predicted. She ensures their recruiting process for graduates goes unnoticed from anyone, even Xavier, Betty, and Jean.