Rio Rita

Origin 

Among her accomplishments, she was also singer and she sometimes she gave performances for the US Military.  She had excellent coverage to observe what was happening and inform the leaders of her country as well. 
 
Once the war ended, Rita has worked primarily in South America. The Nazi criminals were very present in this continent and it was a good place to spy. When FemForce was founded, through President Roosevelt, she was a logical choice to join them.  She was succeeded by her granddaughter, years later.

Footnote:

Senorita Rio was both one of the first of female and first Latina characters in American comics. She is also of note as being the first female character to appear, and then for two years, take over the cover of the former all boys club of Fight Comics, until being replaced by another female character, Tiger-Girl.