Pietro Maximoff, better known as Quicksilver, is a man who was born in the Eastern European country of Sokovia with his twin sister, Wanda. Sokovia, which was embroiled in constant war and strife, became the base of operations for a HYDRA cell operated by Wolfgang von Strucker, who recruited Pietro and Wanda to take part in a series of tests involving the Chitauri Scepter. The tests gave the twins superpowers; while his sister Wanda received a number of mental abilities; Pietro acquired the ability to move at supersonic speeds and other physical features.

Pietro Maximoff was born in the Eastern European country of Sokovia along with his twin sister, Wanda. At the age of ten, while having dinner with his family a mortar shell hit their apartment building, killing Maximoff's parents and trapping him and his sister. A second shell hit the apartment near them but did not go off, the Maximoff twins were left trapped for two days starring at the unexploded shell reading the name on it, Stark Industries.This traumatic experience gave the twins a great hatred for America, Tony Stark and later the Avengers. They often took part and led protests against the Avengers.

hen the twins reached adulthood, foreign powers began occupying Sokovia, driving the country into a state of turmoil. Pietro and Wanda took part in frequent riots to drive the foreign forces out of their streets. What the twins did not realize was that the riots were orchestrated by HYDRA, who had taken up residence in the country and were using the riots to cover up their illegal experiments. The leader of the HYDRA forces in Sokovia, Wolfgang von Strucker, was attempting to harness the energy from the Chitauri Scepter for a variety of uses, such as powering up weapons of mass destruction.

List, desiring to see what effect the scepter's power would have on live humans, asked approached several Sokovian rioters, including Wanda and Pietro, offering them the opportunity to achieve the power needed to free their country from war. While Wanda expressed some doubt over Strucker's claims, Pietro was determined to free Sokovia and convinced his sister to accept.

While the other volunteers did not survive the scepter's power, Pietro and Wanda experienced drastic changes. The scepter unlocked latent supernatural powers within the pair; while Wanda developed a number of mental powers such as telekinesis, hypnosis, and energy projection, Pietro was now able to move at superhuman speed.Soon after, the Avengers arrived in Sokovia and raided Strucker's facility, stealing the scepter and arresting Strucker. In the confusion, Wanda and Pietro escaped from their holding cells and, though inexperienced, were able to use their powers to evade the Avengers and escape. Pietro himself used his powers to distract Hawkeye and Captain America, using his speed to try to stop their advance and to protect a bunker, which is destroyed by the Hulk soon after.

Wanda and Pietro were soon called by Ultron to join him in his plans to destroy the Avengers, knowing that with their powers, they can tear the opposition apart. Soon after, Wanda and Pietro accompany Ultron in acquiring Ulysses Klaue's supply of vibranium. When the Avengers arrived, Pietro attacked Captain America, then Thor trying unsuccessfully to use Mjølnir against him. When Wanda attempted to "hex" Hawkeye - but was subdued by him - Pietro saved her in the nick of time. He took her outside Klaue's base, where she caught sight of the Hulk and manages to "hex" him as well.When the Twins arrived in Seoul, Wanda learned of Ultron's plans upon touching the Cradle and they left the facility, much to Ultron's rage. The Twins then assisted Captain America in fighting off Ultron on a moving passenger train. Wanda managed to stop it when it went off the rails, while Pietro saved people on the road of the train. The Twins then accompanied Captain America back to Avengers Tower and tried to stop Stark and Banner from bringing Vision to life. Pietro succeeded to cut off the electricity from Vision's cradle, but he is soon attacked by Hawkeye, only to witness Thor bringing Vision to life. He and Wanda then joined the Avengers in stopping Ultron and saving Sokovia.

uring the battle of Sokovia, Ultron hijacks a Quinjet and begins to fire its guns at civilians. Pietro bravely uses his powers to save countless lives and sacrifices his own to protect Hawkeye, and a civilian boy. He uses his own body to shield Hawkeye from the Quinjet's bullets, proving he was a true hero and a true Avenger. Unfortunantely, Pietro dies from his wounds, much to his sister's sorrow.
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