Evolvo Lad was created by Edmond Hamilton & John Forte. His first appearance was in Adventure Comics # 324- The Legion of Super Outlaws, Sept. 1964.
The bizarre origin of Tal Nahii who was born with the mutant power to turn into any form of gas at room temperature, thanks to her parents being irradiated during an Atomic accident earlier in their life. The young girl exhibited the ability to transform into any gaseous element at room temperature. Taking great joy at her unique disposition she is known as a bit of a show-off and enjoys shocking people with her sudden transformations. A native of the planet Lallor, she found others born with abilities like herself also due to an Atomic accident on Lallor.
Tal is very bright and impetuous by nature and is often the first to get into trouble. She has a fierce loyalty to the group whom she grew up with as a child and would later join them as the official protectors of Lallor, boasting not to need the mighty Legion of Super-Heroes help in defense. As the years went on she would be quite hurt when Beast Boy left the team due to personal strife. When the long time friend lost his life fighting both them and the Legion she was crushed by Beast Boy's death. She has no known romantic attachments but was noticeably jealous when Ord Quelu, Duplicate Boy, met Shrinking Violet and dated her in a long distant relationship for quite sometime.
Tal was an original member of the super-hero team known as the Heroes of Lallor. Gas Girl enjoys attention, even though most of it is given to her teammate, Duplicate Boy. She particularly enjoys disappearing in front of people to shock them.
At the time of Dominator-controlled Earthgov and the inexperienced leadership of Sun Boy combined to lead the Legion to disband. Five years later, a ragtag group of former Legionnaires pulled back together when former LSH after Blok was murdered, only to stay together in the face of Earthgov harassment.
The team heads for Rimbor in the hopes of finding the lost Ultra Boy, and Wave(Spider Girl) ends up leading her new team right into a trap. The Green Dragon gang is run by none other than Jo Nah in disguise, and he rejoins the team just in time for them to be attacked by the Heroes of Lallor, under the hypnotic control of Universo.
Gas-Girl can transform her body into any form of gas, either pure elements or complex compounds. She can return to solid form in an instant and back to any particular gas with only a thought. While she is in gaseous state she is vulnerable to any chemical interaction that would affect the chemical-form she is currently in.
For example she can be defeated by spraying her with oxygen while she has taken the form of hydrogen, turning her into water. While generally immune to physical harm, she could still be harmed by different types of energy, such as intense winds and lightning, or the sonic booms, and even certain types of radiation.
In Gaseous Form, as said before, she is impervious to physical harm except under the most extreme situations and partial evaporation. She maintains complete control of her molecules even when in the form of poisonous gasses or hallucinogens inhaled by others. Her body mass is at that time in gaseous shape is multiplied and she can attain large volumes of gas.
Marital Status: single
Known Relatives: None
Group affiliation: Heroes of Lallor
Base Of Operations: Lallor
Eyes: Blue Hair: Blond (goes bald by making her hair gaseous)
Height: 5'8"(variable when gaseous) Weight: 120 lbs(variable when gaseous)
Gas Lass is humanoid and has the same physical attributes of a the normal Earth woman of her height and weight. She has normal hair, but she prefers to keep her hair in a gaseous form. Her costume consists of a body suit consisting of three main colors. A white torso that end as boots, white long sleeved gloves, and a small pink tunic like pattern that covers her chest. Her arms, neck, and back are in shiny black.