Negasonic Teenage Warhead first appeared in 'New Mutants' #98 in 1991, created by writer Fabian Nicieza and artist Rob Liefeld as a mutant character with precognitive abilities. Originally depicted as a minor character with limited powers, Negasonic underwent a transformation in the 2016 'Deadpool' film, where she was portrayed as a rebellious and emotionally volatile mutant with explosive powers. This adaptation significantly increased her popularity, transforming her into a fan-favorite character within the Deadpool franchise. The film's portrayal showcased her connection with Deadpool and her sarcastic humor. Since then, the character has seen additional appearances in follow-up media, including comic series reinventions and promotional materials for the superhero film genre, cementing her place in modern Marvel culture.