F.F. has the ability to modify their appearance at any time. Their usual look, however, is that of the prisoner Atroe, a lady of ordinary height and lean frame with hair or a cap covering her head in a mop or bob with a serrated edge at the ends. Her eyes are red like those of a doll. They are thieves who work alone or in pairs, picking pockets or breaking into houses. They usually live on what they steal, although there are reports of some being arrested for crimes they have not committed. The first F.F. was a woman named Francine Francis, who was imprisoned for 15 years for robbery before being released due to lack of evidence. She created the character after being inspired by Zorro, a fictional hero who appeared in several novels written by American author Johnston McCulley. The character became so popular that she has since been portrayed in other media, most notably in a 1944 film noir starring Dennis O'Keefe as the title character. Since then, others have taken up the mask and sword, including a man named Andy Devine who starred in a series of films in the 1950s. There have also been various comic books and video games featuring characters based on F.F., some of which have been made into movies. So, yes, Firefox is a girl!