David Haller

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Name: David Charles Haller
Occupation: Adventurer, student, mutant
Title/Rank: Legion
Location: Ruth Aldine's mind (comics)
Relationships: Gabrielle Haller (mother), Charles Xavier (father), Cain Marko (paternal step-uncle), Cassandra Nova (paternal aunt), Amy Haller (XMM Universe sister), Ruth Aldine (lover), Sydney Barrett (XMM Universe love interest)
Fandom: X-Men, Legion (XMM), X-Men: Evolution
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David Haller aka Legion is an X-Men character. He is currently starring in the FX television series Legion portrayed by Dan Stevens.


Created by writer Chris Claremont and artist Bill Sienkiewicz, Legion made his debut in New Mutants #25 (March 1985). Legion takes the role of an antihero and has a severe mental illness including a form of dissociative identity disorder formerly known as multiple personality disorder in which each of his alternate personas controls one of his many superpowers.

Legion is an omega level mutant, and was also stated to be an Alpha-Level Mutant, with the ability to create spontaneous mutations with varying attributes. Due to either his immense powers, mental instability or combination of the two, David creates a new persona (or sub-personality) to govern each one of these new mutations. Rogue stated that while she was inside Legion, she was connected to thousands types of powers and there were more "being born" all the time.[1]

David Haller has had two appearances outside comics, the first being X-Men: Evolution in Season 4[2] and second (and present) appearance in Legion which is set inside the X-Men Movieverse.


This article or section needs expansion.


In the Legion fandom, fans have started shipping David with Sydney Barrett.


Examples Wanted: Editors are encouraged to add more examples or a wider variety of examples.


Legion (TV)

Legion (TV)/MCU


Legion (TV)



Archives & Fannish Links



  1. David Haller "Powers & Abilities" Profile
  2. X-Men: Evolution Season 4 Episode 4 "Sins of the Son"