Emma Grace Frost is a character appearing in American comic books published by Marvel Comics. Created by writer Chris Claremont and artist/co-writer John Byrne, the character first appeared in The Uncanny X-Men #129. She belongs to a subspecies of humans called mutants who are born with superhuman abilities. Her mutation grants her high-level telepathic abilities and the power to turn into organic diamond. Emma Frost has evolved from a supervillain and foe of the X-Men to becoming a superhero and one of the team's most central members and leaders. The character has also been known as the White Queen and the Black King at various points in her history.

Christopher S. Claremont is an American comic book writer and novelist, known for his 16-year stint on Uncanny X-Men from 1975 to 1991, far longer than that of any other writer, during which he is credited with developing strong female characters as well as introducing complex literary themes into superhero narratives, turning the once underachieving comic into one of Marvel's most popular series.