Dark Phoenix (Jean Grey)

She first ascended as the Phoenix after experiencing death. Corrupted by the Hellfire Club, she was distorted into Dark Phoenix and caused immeasurable destruction. Jean Grey's conscience led the Phoenix to sacrifice herself to prevent further destruction. Jean Grey's connection to the Phoenix, a force of annihilation and rebirth, inflicted a number of deaths and resurrections. Upon one of her returns, Jean Grey took the direction of a parallel X-Men team. On the mutant-exclusive nation of Krakoa, she played a role in the governing body known as the Quiet Council, as well as part of the intelligence sector X-Force, and in the revival of the X-Men as a superhero team.