Proteus (Marvel Comics)

Proteus
Artwork for the cover of X-Men Legacy #233 (February, 2010 Marvel Comics). Art by Adi Granov
Publication information
PublisherMarvel Comics
First appearanceThe Uncanny X-Men #125 (September 1979)
Created byChris Claremont
John Byrne
In-story information
Alter egoKevin MacTaggert
SpeciesHuman mutant
Notable aliasesMutant X
Abilities
  • Reality warping
  • Body possession
  • Psionic energy composition

Kevin MacTaggert, best known as Proteus and also called Mutant X, is a character appearing in American comic books published by Marvel Comics and is commonly associated with the X-Men as an antagonist.

Kevin was the mutant son of Scottish genetic researcher Moira MacTaggert and politician Joseph MacTaggert. Kevin had reality-warping and possession powers and lived most of his life in forced seclusion at his mother's Muir Island research facility.

Kevin's attempt to escape Muir Island and find his father made up a 1979–80 Uncanny X-Men storyline that was adapted in X-Men: The Animated Series. In 2009, Proteus was ranked as IGN's 77th-greatest villain of all time.