Emma Frost

As presented in Marvel Comics publication history and in-universe biography, Emma Grace Frost was born in Boston, Massachusetts, the child of Winston and Hazel Frost. Within the fictional Marvel cosmology she is a mutant (a subspecies of humans born with heritable powers). She debuted in The Uncanny X-Men #129 (January 1980) and was originally portrayed as the Hellfire Club's "White Queen" and an antagonist to the X-Men before evolving into a central X-Men member and leader in later stories.

Publication and character sources describe Frost as a striking, fashion-conscious figure whose early visual design was inspired by the television character Emma Peel (noted influence on provocative corset, collar, and boots in early design). In addition to her human appearance, narratives introduced a secondary physical state: a super-strong "organic diamond" form used as a durable corporeal manifestation of her mutation.

Sources state her mutant abilities include high-level telepathy as her primary power and a secondary mutation enabling transformation into an organic diamond form. Narrative examples describe use of telepathy to create illusions and manipulate minds (for example, turning attackers against each other within an illusion so that criminals later had no memory of her). The diamond form was introduced in Grant Morrison's New X-Men run as a durable, physically strong complement to her telepathic abilities.