Personal data
Name: Superwoman
Alter ego: Clara Kent
Occupation: Newspaper reporter, later editor-in-chief, adventurer
Marital status: Single, later married
Known relatives: Jor-L (father, deceased), Lora (mother, deceased), Eben Kent (adoptive father, deceased) Sarah Kent (adoptive mother, deceased), Zor-L (uncle, deceased), Allura (aunt, deceased), Kara Zor-L (cousin), Louis Lane (husband), Lucille Lane Tompkins (sister-in-law) George Tompkins (brother in-law), Susan Tompkins (niece)
Group affiliation: Justice Society of America, All-Star Squadron
Base of operations: Metropolis
First appearance: Action Comics#1
Height: 6 ft. Weight: 180 lbs.
Hair: Black Eyes: Blue
History
Kara-L was born on the alien world Krypton. A world of super science, its inhabitants possessed remarkable powers. When destruction threatened, her father Jor-L was unable to convince the Science Guild of the danger. As the planet entered its death throes, he sent his only child to Earth in a rocket ship he designed.
Found by a passing motorist (the ship having burned up on landing), the infant was taken to a local orphanage, where she was adopted by Eben and Sarah Kent. The couple raised Clara on their farm, where she discovered her amazing abilities.
In time the Kents died. On his deathbed, Eben told his daughter to use her powers for good. Clara took this advice to heart, deciding on her identity to use her powers only as the colorfully clad Superwoman.
Reporting on Superwoman's first public act earned Clara a job as a reporter at the Daily Star. There she worked under the editor George Taylor and side-by-side with Louis Lane, a courageous reporter, who had a crush on Superwoman but often traded barbs with the timid Clara Kent.
During the war Clara fought beside many costumed mystery men and women in the Justice Society of America, and briefly the All-Star Squadron. After the war, Clara found herself fighting crime more as a reporter and less a superhero. When George Taylor's replacement Perry White stepped down as editor-in-chief, Clara replaced him.
She learned the existence of her home world when another rocket ship crash-landed near Metropolis, and she discovered the occupant. Overseeing the training of her newly arrived cousin Kara Zor-L (see Supergirl, Power Girl) saw that the legacy of Superwoman would continue to exist.
Powers & Weapons
Superwoman has tremendous strength, near total invulnerability (a bursting shell for example is not capable of damaging her skin), super-speed, enhanced muscle control, super breath, and various vision-based powers (heat, x-ray, microscopic, and telescopic). Unlike her cousin, she could not fly, but possess the strength and density to leap a multi-story building usually in a single bound. Her only limitation was to magic based attacks, or the strange element known as K-metal. Purer forms of K-metal were later dubbed kryptonite, with each strain affecting her differently.
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So yeah, the Woman of Steel, Superwoman! Her costume would be more or less exactly the same. More Golden Age level powers but there might be some Silver Age silliness at some point.