Pietro Lehnsherr (Earth-4126)

"Sometimes, I don't know why, but I disagree with my father's decisions. I don't think I want to be bad anymore."

-Pietro Lehnsherr

Childhood
At birth, Pietro was separated from his twin sister, Wanda. He was taken by their father, while she was abandoned. Pietro was immediately taken into the ranks of HYDRA, being trained since he was a baby. When his speed developed, Magnus was disappointed he did not have the same powers, but he was still proud of Pietro's progress.

Quicksilver
After turning 14, Pietro was given his costume and the mantle of Quicksilver. He was made one of the heads of HYDRA, alongside his parents, Baron Magnus and Emma Frost. He enjoyed using his powers for everything and bossing everyone else around. However, when he got too out of line, Magnus would punish him, so Pietro learned his lesson quickly.

Pyro
When HYDRA recruited a new mutant named Pyro, Pietro befriended him quickly and he was ranked up high very soon. The two became best friends and enjoyed torturing the human agents and anyone beneath them. However, Magnus did not approve of their friendship because he thought Pyro was too reckless and needed to be put in his place. When He tried to hurt Pyro, Quicksilver defended him and told off his father, and this caused a rocky relationship between the two of them.

X-Men
During the first battle between HYDRA and the other mutant group called the X-Men, Quicksilver did not have contact with his sister. He battled the team's leader, Cyclops. He was too much of a match for him, and when he took of Cyclops's visor, he blew a hole in the base, which gave Magnus an opportunity to get rid of the X-Men in order for repairs. After the battle, Magnus was furious with Pietro and locked him in his room for a week.