Zarda is one of the Utopians, an advanced genetic offshoot of humanity that lived on Utopia Isle on Earth-712. The Utopians sent Zarda to the United States as their ambassador during World War II. As Power Princess, Zarda joined the Golden Agency a small battalion of costumed champions organized by the United States War Department and serving the Allies in the European and Asian Theatres of War. She also fell in love with Howard Shelton, a sailor whom she had rescued from death. After the bombing of Hiroshima and Nagasaki the Utopians left Earth to settle on another planet fearing that if they remained on Earth they would be destroyed in an eventual nuclear war. Power Princess was the only Utopian to remain on Earth.