When they heard that the Avengers were accepting applicants, they rushed to join, wanting to atone for their past crimes.
Quicksilver and the Scarlet Witch served honorably with the Avengers for years, though Pietro’s arrogant and distrupting demeanor often made him an outsider in the group.
Orphaned, the twins wandered Eastern Europe, constantly on the move as Wanda’s uncontrollable hex powers would draw suspicion from the people around them.
One day Wanda accidentally set a house on fire, spurring the locals to attack the twins.
Whilst at Wundagore Mountain, they were telepathically asked by Professor X to join the X-Men so that they could help them fight against Factor Three, but the two mutants declared that if they should return to America, it would be as Avengers.
Upon their return, Quicksilver's powers had somehow increased, as he could now fly for short distances by vibrating his feet at high speeds.
He would often clash with Hawkeye over which one of them should replace Captain America as a leader.
He fell deeply in love with her and the two got married.She then immediately fled into a raging blizzard and was never seen or heard from again.Given her weakened state following delivery, it is assumed that she perished.While at Wundagore Mountain, they were also offered for adoption to the Whizzer when his wife died.He did not accept them, but thought that they were his children.