Jean Grey

Jean Elaine Grey is a fictional character appearing in American comic books published by Marvel Comics. The character also went by the aliases Marvel Girl, Phoenix and Dark Phoenix. Created by writer Stan Lee and artist/co-writer Jack Kirby, the character first appeared in X-Men #1 (Sept. 1963)

Youth
Jean Elaine Grey was the second daughter of John Grey and Elaine Grey. She had an older sister, Sara Grey-Bailey. John Grey was a professor at Bard College in upstate New York. Depictions of Jean's childhood and her relations with her family have shown a stable, loving family life growing up.

Emergence of powers and joining the X-Men
Jean's mutant powers of telepathy and telekinesis first manifest when her best friend is hit by a car and killed. Jean mentally links with her friend and nearly dies as well. The event leaves her comatose, and she is brought back to consciousness when her parents seek the help of powerful mutant telepath, Charles Xavier. Xavier blocks her telepathy until she is old enough to be able to control it, leaving her with access only to her telekinetic powers.

Phoenix Force and first death
During an emergency mission in space, the X-Men find their shuttle damaged. Jean pilots the shuttle back to Earth, but is exposed to fatal levels of radiation. Dying, but determined to save Cyclops and her friends, Jean calls out for help and is answered by the cosmic entity, the Phoenix Force.