Original name of Legion of Super-Heroes member, Duo Damsel. Possessing the ability to split into three identical forms, Triplicate Girl joined the Legion as its first non-charter member.

During a battle with the villian Computo, one of Triplicate Girl's forms was killed. Expecting to die as all people from her planet did when one of their forms died, Triplicate Girl found that she continued to live and kept the ability to split, but only into two forms. She stayed with the Legion, adopting the name Duo Damsel.