..Jemm is the prince of the Saturnians, a genetically modified species of Martian created by the other Martians to help them colonize the planet
Saturn. The
White Martians treated their clones as slaves, leading to a civil war between the two Martian races regarding their treatment. At the end of the war, the Saturnians gain freedom from the Martians and the White Martians are exiled to the Still Zone, a realm similar to the
Phantom Zone. Jemm is forced to flee the Saturnians' palace after a White Martian coup. His mother Jarlla hides him in a cave, where he is trained by the White Saturnian Rahani. After Jarla and Rahani are killed by White Martians, Jemm steals a ship and escapes to Earth, searching for his lover Syraa. He arrives in
Harlem and befriends
African-American orphan Luther Mannkin. Jemm later locates Syraa, with whom he travels to New Bhok, a Red Saturnian colony. Jemm is exiled from the Saturnians due to his refusal to participate in a civil war occurring on New Bhok.
Injustice Gang Jemm resurfaces years later as a member of the
Injustice Gang, having been brainwashed by
Lex Luthor and used a weapon against the
Justice League. Martian Manhunter telepathically connects with Jemm, which frees him but leaves him comatose. He then learns that Jemm has been chosen to enter an
arranged marriage with White Saturnian princess Cha'rissa to unite the Red and White Saturnians.
New Krypton Jemm appears in
Superman: World of New Krypton as the leader of the Saturnians. He commands all three known Saturnian races, including the white Koolars and the yellow "
Faceless Hunters". ==Powers and abilities==