Gender in speculative fiction
The first known female superhero is writer-artist Fletcher Hanks's minor character Fantomah, an ageless, ancient Egyptian woman in the modern day who could transform into a skull-faced creature with superpowers to fight evil; she debuted in 1940 in Fiction Houses "Jungle Comics".
Phantom Lady
Phantom Lady is a fictional superheroine, one of the first such characters to debut in the 1940s Golden Age of Comic Books. Originally published by Quality Comics, the character was subsequently published by a series of now-defunct comic book companies, and a new version of the character currently appears in books published by DC Comics.