Superman

Clark Kent was originally born on a planet known as Krypton and was named Kal-El. A superior species in almost every way, Kal is an incredibly powerful alien superhero of the House of El, son of Jor-El and Lara Van-El, grandson of Seg-El, adopted son of Jonathan and Martha Kent. When Kal-El's father, Jor-El, realized that Krypton was doomed, he and his wife Lara sent their son to Earth, where he would be found by Jonathan and Martha Kent. Later in life he decided he couldn't just be Superman and he wanted to live a normal Human life. So he applied for a job and shortly after became a journalist of the Daily Planet.

While Clark was a child on Earth he slowly discovered his abilites. Using his abilites, he defends the people of Metropolis from threats, such as the terraforming attempted by the Kryptonian war criminal General Zod, using the moniker Superman.

Shortly after General Zod was killed another threat opposed by the name of Chronos. Chronos killed Superman with his future technology but Superman being the handsome son of a bitch he is he came back in time to help Batman and the rest of the JL stop him from invading our timeline.