Man... A lot of people here don't like female protagonists, or something. Raven was clearly thought of, and intended as, a main part of the story since the very outset of this game, as evidenced by the dark room in the 'gallery' section of the menu, with all the pictures hanging from a line drying off. Raven is probably the woman on the phone that Nick talks to, when he says, "I want all the Polaroids." Photography and Raven's role as a photographer must have some essential significance in the story. It's not at all uncommon for a switch of point-of-view to happen within a written novel, so why not a visual novel?