Kryptonians were the native sentient species of the planet Krypton. Physically similar to Humans, Kryptonians have a rigid caste system. There were six primary Guilds – the Lawmakers Guild, the Military Guild, the Science Guild, the Religious Guild, the Artisans Guild, and the Technicians Guild – and the Rankless who were considered the lowest in terms of rank.
Kryptonian reproduction was achieved through use of the Genesis Chamber which could grow a foetus from genetic material donated from two parents. The Chamber could also predict the child's eventual physical features, medical history, name, and occupation.
Kryptonians have a detached, more rational way to see things. They believe in productivity and sufficiency. They also think very highly of themselves. Kryptonians have a centrist vision of the world and think Kryptonians are the only civilized and worthy planet made in the universe.
Kryptonians metabolism is changed and reinforced when submitted to yellow sun radiations. They possess the ability to fly, super-strength, super-vision, heat vision, invisibility, super-hearing, and super-breath.