Emma Frost

With the Inner Circle
Emma Frost was a telepathic mutant who was a member of the Inner Circle. She was recruited to launch a psychic attack on the X-Men member Jean Grey in order to draw out the Phoenix Force. She succeeded in drawing out the Phoenix Force, but Professor X sensed Emma's interference and Jean Grey unleashed the full force of her power to defend the team. In doing so, Jean Grey unleashed the Phoenix Force and created a massive explosion that destroyed the Xavier Institute. Jean disappeared in the attack and the Professor was left comatose. Emma and her Cuckoos were forced to improvise by taking the Professor's body before any of the X-Men recovered and left him in Genosha.