#OnThisDay in 1961 #TriplicateGirl debuted in #ActionComics #276 #OneOfThreeFemaleLegionnaires who visit #Supergirl in #20thCentury & invite her to repetition for #LegionOfSuperHeroes #membership & exhibits #thePowerToSeparateIntoThreeForms but #oneisLaterKilled leaving #DuoDamsel #1stLegionBride