White Martians are an alien species from the planet Mars. The White Martians lived under the surface of the planet Mars, one day they emerged from underground apparently wiping out the entire race of the Green Martians, leaving J'onn J'onzz as the sole survivor; however, it is later revealed that they did not wipe out all the Green Martians, as they were turned into White Martians by the latter's who injected them with their own blood.
M'gann M'orzz felt their purge was wrong and tried to save as many of the Green Martians as she could though they were killed when her actions were discovered. She then fled to Earth where she eventually worked quietly in an Alien Bar in National City. She then met and befriended J'onn J'onzz by initially pretending to be a fellow Green Martian survivor though her ruse was soon discovered. While initially distrustful of her after the revelation, J'onn eventually forgave her and they went on to form a Martian Bond. The bond grew deep enough that they even started to fall in love with each other. Her people then discovered M'gann on Earth and sent assassins, including her old comrade Armek, to eliminate her but their attempts were thwarted. M'gann then left to return to Mars to try and find other White Martians that held the same feelings and virtues that she did. She found that there were fellow White Martians that shared her feelings and when National City was in trouble by Rhea and her invasion, they arrived to help defend it against the Daxamites.
Known White Martians:
Armek
M'Gann M'orzz
Typical White Martian
