Superman is a fictional character, a comic book superhero who appears in comic books published by DC Comics. He is widely considered to be an American cultural icon. Superman possesses extraordinary powers, with the character traditionally described as “faster than a speeding bullet, more powerful than a locomotive, and able to leap tall buildings in a single bound”
He adheres to a strict moral code often attributed to the Midwestern values with which he was raised. His commitment to operating within the law has been an example to many other heroes but has stirred resentment among others, who refer to him as the “big blue boy scout.” Superman can be rather rigid in this trait, causing tensions in the superhero community, notably with Wonder Woman (one of his closest friends).
Having lost his home world of Krypton, Superman is very protective of Earth, and especially of Clark Kent’s family and friends. This same loss, combined with the pressure of using his powers responsibly, has caused Superman to feel lonely on Earth, despite his many friends, his wife and his parents.
Superman is most vulnerable to green Kryptonite, mineral debris from Krypton transformed into radioactive material by the forces that destroyed the planet. Exposure to green Kryptonite radiation nullifies Superman’s powers and immobilizes him with pain and nausea; prolonged exposure will eventually kill him. The only substance on Earth that can protect him from Kryptonite is lead, which blocks the radiation.