Querl Dox, descendant of one of Superman’s greatest foes, joined the Legion of Superheroes to atone for his ancestor’s crimes by using his Twelfth-Level Intelligence to better humanity and combat crime.
Luornu Durgo was born on Cargg, a planet with three suns, where the inhabitants developed the ability to split into three identical duplicates, but Luornu’s duplicates were distinct in personality. Luornu travelled to Earth to try out for the Legion of Superheroes, and joined as Triplicate Girl.
Thom Kallor was the first metahuman born on the planet Xanthu, to two astronomers. Kallor joined the Legion of Superheroes due to his ability to manipulate gravity. Kallor is noted for his spacey-personality and his infatuation with Dream Girl.