Ayla Ranzz (of the planet Winath, where twinning is normal) first appeared in Adventure Comics #308, (May 1963). She is the twin sister of fellow Legionnaire Garth (Lightning Lad) and the younger sister of the villainous Mekt (Lightning Lord). All three gained their lightning powers after being attacked by creatures called lightning beasts on the "lightning world" of Korbal. She originally joined the Legion disguised as her brother Lightning Lad, claiming to be her brother back from the dead, after Lightning Lad's apparent death at the hands of Zaryan. Her being an imposter was soon discovered, but she was admitted into the Legion as Lightning Lass.
For many years she was called Light Lass, after Dream Girl used the science of her homeworld Naltor to change Ayla's lightning powers with the ability to make objects super-lightweight, or anti-gravity powers (The Light Lass powers were explained both ways over the years).
Years later, Ayla left the Legion for a time, disillusioned with her Legion career and having ended a lengthy romance with fellow Legionnaire Timber Wolf. She broke up with him following a misunderstanding when she saw Timber Wolf embracing her sister-in-law Saturn Girl when both were stranded on a frozen asteroid. Eventually returning to Winath, Ayla was kidnapped by her brother Lightning Lord and a faction of the Legion of Super-Villains. When Ayla refused to join them, her brother tried to kill her by sending millions of volts of electricity through her body. However, Ayla survived and discovered that her original lightning powers had been restored. After the LSV was defeated, she rejoined the Legion as Lightning Lass.
Later Ayla entered into a long-term relationship with Shrinking Violet.
During the "Five Year Gap" following the Magic Wars, Earth fell under the covert control of the Dominators, and withdrew from the United Planets. A few years later, the members of the Dominators' highly classified "Batch SW6" escaped captivity. Originally, Batch SW6 appeared to be a group of teenage Legionnaire clones, created from samples apparently taken just prior to Ferro Lad's death at the hands of the Sun-Eater. Later, they were revealed to be time-paradox duplicates, every bit as legitimate as their older counterparts. After Earth was destroyed in a disaster reminiscent of the destruction of Krypton over a millennium earlier, a few dozen surviving cities and their inhabitants reconstituted their world as New Earth. The SW6 Legionnaires remained, and their version of Ayla Ranzz (possessing the Light Lass powers) assumed the code name Gossamer
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