Quicksilver

Quicksilver is a character appearing in American comic books published by Marvel Comics. Created by Stan Lee and Jack Kirby, the character first appeared in The X-Men #4 (March 1964). Originally introduced as an antagonist in Magneto's Brotherhood of Evil Mutants alongside his twin sister, Scarlet Witch, Quicksilver later reformed and joined the Avengers beginning with The Avengers #16 (May 1965), becoming part of the team's second generation.

Quicksilver is the superhero persona of Pietro Django Maximoff, a speedster capable of moving and thinking at extreme speeds. Throughout Marvel continuity he was long portrayed as the mutant son of Magneto and a Romani woman, Magda, and as the half-brother of Polaris; he was also formerly married to Crystal of the Inhumans, with whom he has a daughter, Luna. A 2015 retcon established that he and his sister were not Magneto's children or mutants, but ordinary children whose powers had been artificially induced through experimentation by the High Evolutionary, which drew sustained criticism from commentators who argued that the twins' connection to Magneto was integral to their characterization. Scholars and critics have identified Pietro and Wanda as among the most visible Romani characters in mainstream superhero comics.