Invisible Woman is the superhero identity of Susan Storm. She is a member of the Fantastic Four, wife of Reed Richards / Mr. Fantastic and sister of Johnny Storm / Human Torch. She is also an object of infatuation for Doctor Doom and Namor the Sub-Mariner.
Some of her powers and abilities include rendering herself invisible at will, generating force fields and controlling objects with telekinesis. All her superpowers were gained from exposure to the cosmic rays in space.
Unlike most superheroes who kept their secret identities a secret, Susan Storm's identity is publicly known to the world.