Quicksilver is the brother of the Scarlet Witch and the son of Magneto, although this latter fact was not known for many years. The siblings were initially super-villain members of Magneto's Brotherhood of Evil Mutants, but they soon reformed and joined The Avengers. Quicksilver was later a member of the team X Factor for a short time when he was at odds with the Avengers. He was married to Crystal of the Inhumans and their pair had a daughter, Luna.
Quicksilver possesses the superhuman ability to run, think and react at great speed. He is even able to fly for short distances. In this regard, he is a counterpart to DC Comics' The Flash.