Superman

Superman (born Kal-El, later took the name Clark Kent) is a Kryptonian and leader of the Justice League as well as Superboy's mentor and the Man of Steel.

Appearance
Superman resembles a tall, muscular, black-haired Caucasian male. He wears a blue uniform with a red-and-yellow 'S' symbol on his chest, and a red cape.

History
On July 4, Superman called the rest of the Justice League at the Hall of Justice, informing them about a fire at Project Cadmus. Batman saw this as an opportunity to investigate Cadmus, but the League was distracted by Zatara's request to help prevent the sorceror Wotan from blocked out the Sun by using the Amulet of Aten.

Superman was later present, along with the rest of the League, following the destruction of the ground-level Cadmus facility in Washington, D.C.. He was introduced to his clone Superboy for the first time, although he initial mixed reaction to the existence of his clone caused some tension between them. After the matter was explained, he tried to talk to Superboy again, but found this uncomfortable and flew away to help deal with Blockbuster.

Powers & Abilities
Superman has the normal abilities of a kryptonian under a yellow sun, such as:
 * Super strength
 * Flight
 * Super speed
 * X-ray vision
 * Super breath
 * Invulnerability
 * Super hearing
 * Heat vision
 * Freezing breath

Weaknesses

 * Green Kryptonite

Superboy
Superboy is Superman's genetic clone. During incubation at Cadmus Labs, Superboy was programmed to both take over from Superman if Superman ever died and to defeat Superman if Superman ever went bad. He respects Superman, to the extent that Aqualad was able to convince him to resist the G-Gnome's telepathic control by asking "What would Superman do?"

Superboy first met Superman shortly after the destruction of the Cadmus facility. Although Superboy appeared hopeful about the meeting, Superman was shocked, possibly disgusted, by the existence of a clone. This caused some tension between the two of them. After the matter had been explained, Superman attempted to talk to Superboy, saying that the League would figure something out for him, but he clearly found it uncomfortable and quickly excused himself.

Production background
Superman was the only character outside the main cast of 6 that was auditioned. This was because the producers wanted the same actor to play Superman and Superboy, his clone. Both parts are played by Nolan North.