It's an unknown woman. It is not Ozzy, and there's no evidence that it's Bill Ward's first wife in front of their cottage as some have also claimed. According to Pete Sarfas, she was an actor who was hired for the photos. After the album had been released she met the band. There was supposedly an interesting story about her, but the Black Sabbath Appreciation Society folded before that story made it to print. There is no information on who the person who was on the Paranoid album cover.