The Invisible Woman, previously known as the Invisible Girl, is a fictional superheroine that appears in comic books published by Marvel Comics. She was the first female superhero created by Marvel in the Silver Age of Comics. Like the other founding members of the Fantastic Four, Sue received her powers after being exposed to a cosmic storm. Her primary power deals with light waves, allowing her to render herself and others invisible. She can also project powerful fields of invisible psionic energy which she uses for a variety of offensive and defensive effects. Sue plays a central role in the lives of her hot-headed brother Johnny Storm, her brilliant husband Reed Richards, her close friend Ben Grimm, and her children. An object of infatuation for Doctor Doom and, most notably, Namor the Sub-Mariner, Sue's passive invisibility power translated into her frequent deployment as a damsel in distress during the team's early adventures. Upon developing the ability to project powerful fields of energy, Sue Storm became a more powerful member of the Fantastic Four, and the team's second-in-command with a growing assertive confidence.