Lightning Lass
From superman.nu: Supermanica
Real Name: Ayla Ranzz
The twin sister of Lightning Lad, Garth Ranzz, and younger sister of Lightning Lord, Mekt Ranzz. Ayla gained her powers with her two brothers on the planet of Korbal.
Ayla first joined the Legion of Super-Heroes while masquerading as her dead brother, Garth.
She later lost her lightning-hurling abilites and developed a new power: the ability to make things super-light. Ayla then changed her codename to Light Lass.