Pietro Maximoff
Real name: Pietro Maximoff
Height: 6'
Weight: 175 lbs.
Eyes: Silver
Hair: White
Strength level: Quicksilver possesses superhuman strength primarily in his lower body as part of his body's adaptations for running. With his upper body he can lift (press) approximately 1000 pounds.
Other aliases: None known
Identity: Publicly known
Occupation: (current) Adventurer, (former) Terrorist, officer of the Inhumans militia, United States government operative Place of birth: Wundagore Mountain, Transia (in Eastern Europe)
Marital status: Married
Known relatives:
Magneto (father), Magda (last name unrevealed, mother, presumed deceased),Wanda Maximoff (Scarlet Witch, sister), Crystal (wife), Luna (daughter), Medusa (sister-in-law), Black Bolt, Gorgon, Karnak, Triton, Maximus (cousins by marriage), Vision (former brother-in-law)
History: Pietro Maximoff is the son of the mutant called Magneto and his wife, the gypsy named Magda. Just prior to Pietro's birth, Magda fled from Magneto, terrified of the bizarre powers he suddenly manifested and his intentions of world domination. Seeking refuge in the scientific citadel of Wundagore in the Balkan Mountains of the tiny European nation of Transia, Magda was taken in by Bova, a humanoid cow evolved by the genetic engineer called the High Evolutionary. Magda gave birth to twins, a boy and a girl, with Bova as her midwife, and named them Wanda and Pietro. Still afraid that her husband might find her and learn of the children, Magda left Bova a note explaining her fears and walked into the frozen mountain wilderness to perish.

Feeling that it was not right to raise two seemingly normal babies amid the evolved animal-men of Wundagore, Bova was relieved when, several nights later, an American couple, Robert and Madeline Frank, also came to Wundagore seeking assistance. The Franks were former super heroes active during World War II known as the Whizzer and Miss America; Madeline was now pregnant and about to give birth. Bova intended to give the couple the days-old twins to raise along with their own newborn. Unfortunately, the couple's child was stillborn and Madeline died from complications in giving birth. Bova presented Robert Frank with the twins, claiming they were his own natural children, in the hope that it would assuage his grief. Instead, Frank fled from Wundagore upon hearing of his wife's death, nearly insane with grief

Bova then presented the twins to her master, the High Evolutionary, who agreed to find foster human parents for them. He chose Django and Marya Maximoff, a gypsy couple camped nearby who had lost their own twin children during World War II. The Maximoffs accepted the strange gifts from the High Evolutionary and cared for the children as if they were their own.

As adolescents, Wanda and Pietro discovered that they had unusual superhuman abilities. When Django began to steal food to feed his starving family, enraged villagers attacked the gypsy camp. Using his phenomenal speed, Pietro fled from the camp with his sister. The circumstances of their separation from their family were so traumatic that not until well into adulthood could they remember anything but the barest details of their childhood. For the next few years Wanda and Pietro wandered central Europe, living off the land.

One day, Wanda accidentally caused a house to burst into flame through her hex powers, which she could not yet control. The townspeople began chasing her, thinking she was a witch. Despite Pietro's attempt to defend her, they were soon overpowered and were about to become victims of mob violence when Magneto came to their rescue. Magneto pressed them into service in his Brotherhood of Evil Mutants, costumed them, and named them the Scarlet Witch and Quicksilver. For months they served Magneto out of a sense of obligation and fear of his reprisal.

After a while Both became tired of being treated so badly and left to join the Avengers
Seriously injured during a battle against the Sentinels, Quicksilver was taken to medical care by Crystal, a member of the royal family of the hidden race of Inhumans. . During that time Quicksilver became romantically involved with Crystal, and the two married after a brief courtship.

Confronting Quicksilver and his sister in Attilan with the truth of who he was, Magneto apparently hoped to sway his children to rejoin his crusade against humanity. But Quicksilver denounced Magneto for his callous treatment of them when they were members of his Brotherhood of Evil Mutants and refused to believe he had changed his ways.

Quicksilver's neglect of his wife led Crystal to become involved with another man. Learning of her infidelity, Quicksilver refused to forgive her and fled Attilan, vowing vengeance on her and all those he perceived as having wronged him. Unknown to anyone, however, Crystal's malevolent cousin Maximus was manipulating Quicksilver's mind, fanning Quicksilver's anger at Crystal into a rage directed against his former colleagues in the Avengers. 

Eventually Maximus' control over Quicksilver's mind lapsed and Pietro ended his criminal ways. The Inhumans' monarch Black Bolt commanded that the reluctant Quicksilver reconcile with Crystal. Their initial attempts failed. Eventually Crystal took Luna to Earth and joined the Avengers, and Quicksilver shortly afterwards became a special operative of the United States government in its new version of X-Factor.

Quicksilver and Crystal again attempted a reconciliation, and this time they were successful. Quicksilver left X-Factor and again became affiliated with his wife's team, the Avengers. However, their happiness was short-lived, because Crystal seemingly perished in the Avengers' battle against Onslaught. During her absence, the High Evolutionary asked Quicksilver to become the leader of a small band of his Knights of Wundagore. Quicksilver accepted and now leads the Knights in battles against injustice. Quicksilver and Crystal were happily reunited after she and the other missing Avengers finally returned to their native Earth.

Known superhuman powers: Quicksilver is a mutant who possesses the superhuman capacity to think and move at great speeds. His entire body is adapted towards the rigors of high-speed running.