Quicksilver is a fictional superhero appearing in Marvel Comics. He is known for his superhuman speed, which allows him to move and think at incredible velocities. Quicksilver, whose real name is Pietro Maximoff, is often associated with the X-Men and is the twin brother of Scarlet Witch. First introduced in the 1960s, Quicksilver has been a member of various superhero teams and has appeared in numerous comic book series, animated shows, and films. His character explores themes of loyalty and family, particularly in relation to his sister, Wanda Maximoff, and their complex relationship.