She predated Marvel's Storm by four years and DC's BumbleBee by five years.
Secretly Las Vegas cabaret singer Marian Michaels, the flying femme's origin and crime-fighting motivations were never revealed.
Butterfly wore a somewhat-skimpy winged costume (note: there are no color pics of the character) with an anti-gravity device/mini-jet for propulsion, and high-intensity strobe lights to blind her foes.
Whether she created the costume and equipment herself or was given them is another mystery.
She's also a trained hand-to-hand combatant.
This premiere story was written by Gary Friedrich, pencils by Ross Andru, inks by Jack Abel and Mike Esposito.
Tomorrow: Enter...the Wild Bunch!