Both Nulldev and Mrttao have a point. In
mrttao 's case, you are right that someone who does porn of any kind or knows about it, can't technically be called innocent in the sense of being unaware or uninformed of what porn is. You could even argue that another definition "having or showing the simplicity or naiveté of an unworldly person" shouldn't apply since the fantasy is about rape. Then again, those are extremes that quickly fall apart if you think about them. Most other definitions mean without guilt, sin or moral wrong... often used to denote someone pure, or a child (not an adult).
Nulldev above is right in highlighting the apparantely, since by today's standards and considering where the word was written, innocent means someone young that looks innocent, similar to how everyone knows that petite teen actress who starred in over ninety adult films over eight years is neither innocent nor teen, by this point, yet advertisement tries to bend the truth because... it's what it looks like. And finally... the cute, innocent means cute and innocent... prefaced by apparently. Thus, apparently cute and apparently innocent.
And if you think she looks like a boy, try the game, it's quite short, maybe you'll be surprised by what you find below their skirt.