Real Name: David Charles Haller
Other Aliases: Jack Wayne, Cyndi
Identity: The general populace is unaware that Haller is a superhuman mutant.
Occupation: Student
Legal Status: Citizen of Israel with no criminal record, still a minor
Place of Birth: Haifa, Israel
Place of Death: Israel
Marital Status: Single
Known Relatives: Charles Xavier (Professor X, father), Gabrielle Haller (mother), Cain Marko (Juggernaut, foster uncle), Brian Xavier (grandfather, deceased), Sharon Xavier (grandmother, deceased)
Base of Operations: Moira MacTaggert's Mutant Research Center, Muir Island, off the coast of Scotland; formerly Haifa and Paris
Group Affiliation: None
First Appearance: NEW MUTANTS #25
Final Appearance: UNKNOWN AT THIS TIME

History: David Charles Haller is the son of Charles Xavier, who later became the founder of the two teams of superhuman mutants, the X-Men and the New Mutants, and Gabrielle Haller, who later became the Israel ambassador to Great Britain. Xavier and Gabrielle Haller had an affair in Israel nearly two decades ago, and Xavier was unaware when he left Israel that Haller was pregnant with his son. Haller concealed the fact that Xavier was the father of her son, David, and Xavier himself only learned that he was David's father recently. Because Xavier was himself a superhuman mutant, David was born a mutant with the potential for superhuman powers.

When David was living in Paris with his mother, who was a member of the Israel diplomatic service, her home was invaded by a terrorist assassination team out to kill every Israeli they could find there. They murdered David's godfather, Daniel Shomron, before his eyes. David's terror catalyzed his latent psionic powers, which he used to incinerate the brains of the assassins. However, as he did so, he found himself making telepathic contact with each of his victims, thus experiencing their thoughts and emotions as they died. The horror of all this deeply traumatized the gentle, loving David, forcing him into a catatonic state. The consciousness of the leader of the assassins, Jemail Karami, was absorbed into David's mind.

Karami's consciousness merged with David's, and it took Karami years to separate his consciousness from his psychic captor's. Nevertheless, although Karami regained his own sense of self, his consciousness remained trapped within David's mind. Karami discovered that he somehow gained control of David's mutant telepathic power and used it to read David's mind. Karami thus discovered that David was essentially a gentle, innocent person. Karami then read the minds of Gabrielle Haller and others, and thus gained an understanding of Karami decided to restore David's mind to normalcy. The terrible trauma that David had suffered had splintered David's personality into multiple personalities. Each of these many personalities controlled a different psionic power. The nature of most of these powers is as yet unknown. Karami began re-integrating these personalities into David's core personality, which was that of a little boy desperately needing parental help. However, some of these personalities resisted Karami's efforts, and two proved to be particularly formidable opponents: Jack Wayne, a swaggering adult roustabout adventurer, who commanded David's telepathic power, and Cyndi, a temperamental, rebellious girl who controlled David's pyrotic power. Wayne was especially hostile, and intended to destroy Karami's consciousness somehow in order to preserve his own independent existence within David's mind. Karami found himself fighting a war with Wayne and the other resisting personalities within a dreamscape world within David's mind that resembled a mad blend of Paris (from David's childhood memories) and Beirut (from Karami's memories).

When David was in his late teens he had gone from being catatonic to being autistic and had been placed by his mother in the care of Dr. Moira MacTaggert, a renowned scientist engaged in the study of mutants, and a longtime colleague of Charles Xavier. David began to manifest his psionic abilities uncontrollably in the real world, and absorbed the psyches of two of MacTaggert's friends, Tom Corsi and Sharon Friedlander. MacTaggert summoned Xavier to her research center on Muir Island off the coast of Scotland, and he brought with him several of the New Mutants, including Cypher, Mirage, and Wolfsbane. David absorbed MacTaggert and Wolfsbane's consciousnesses, or their astral selves, into his mind. Xavier's astral self attempted to probe David's mind, bringing Mirage's astral self with him for assistance. David's mind then absorbed the astral selves of Cypher and Gabrielle Haller, and the astral selves of Xavier and Mirage followed them into David's mind. It was just before Xavier actually entered David's mind that he learned that David was his son and that the multiple personalities called themselves Legion (after the Biblical quotation "My name is Legion for I am many").

All of the consciousnesses that Legion had just "captured" retained their independent existences within David's mind. These new arrivals found themselves teaming up with Wayne and Cyndi against Karami, having been deceived by Wayne as to Karami's true motives. However, Mirage prevented Wayne from destroying Karami, who told her and Gabrielle Haller how he had been trying to help David. Working with the reluctant Wayne, Mirage and Karami completed the task of restoring David's mind to near-normalcy, and Mirage and Karami returned the consciousnesses absorbed from outside (including Mirage's own) back to their own bodies. (Since Karami's body was long dead, his psyche remained within David's mind.)

However, Karami was unable to integrate the Wayne and Cyndi personalities into David's core persona, and so they remained separate personalities within David's mind. Wayne and Cyndi sometimes spoke to people in the real world through David, as could Karami, whose consciousness also remains an independent entity within David's mind. However, David himself was no longer autistic, and his normal, core personality was in control of his mind and body. Since he had been autistic for half his life, David's dominant personality was still that of a ten-year-old boy, the same as it was before he suffered the trauma. Apparently the conflict within David's mind among his splinter personalities affected his physiognomy, accounting for his unusual appearance. (Perhaps one of his personalities controlled shapeshifting powers.) It is not known whether or not David would have become more normal in appearance now that his normal personality had been restored to control of his body.

An alternate future dubbed the "Age of Apocalypse" was created when Legion went back in time to kill Magneto before he could oppose Xavier's dream, but instead Legion ended up inadvertently killing Xavier. It became the X-Man Bishop's task to set things straight as the only person able to remember the proper events. When Bishop went back in time to just before Xavier's death he used Legion's own power to create a psionic loop which forced him to see the damage he had caused by accidentally killing his father. The energy released in doing this was so intense that only one of them could survive, and thus Legion passed away. Since Bishop had thus prevented Legion from killing Xavier, the X-Men's normal timeline was safe.

Height: 5 ft. 9in.
Weight: 130 lbs.
Eyes: (left) Green, (right) Blue
Hair: Black

Strength level: In the real world Legion possessed the normal human strength of a young man of his age, height, and build, who engaged in no exercise for half his life, but thereafter began to engage in moderate regular exercise.

Known superhuman powers: Legion was a mutant with three superhuman psionic powers. He was a telepath, capable of reading minds and projecting his thoughts into the minds of others. He was a telekinetic, who could levitate objects at will and create protective force fields around himself that could repel oncoming objects. He was also a pyrotic, who could psionically start fires. The extent of his powers within the real world is unknown. His telepathic power was controlled by the consciousness of Jemail Karami within his mind, his telekinetic power was controlled by his splinter personality Jack Wayne, and his pyrotic power by his splinter personality Cyndi. For a long time David's dominant core personality could not control these powers; if Karami's, Wayne's, or Cyndi's personality took control of David then he could employ the power that personality controlled. Apparently, Legion's core personality finally took control of his splinter personalities' powers, since he manifested psionic abilities when he traveled back in time.

Note: Legion's other splinter personalities could each control other psionic powers. Perhaps these powers died when these splinter personalities were absorbed into David's core personality.