Well I'm just going to say what the meaning of the picture is. Those are great interpretations by the way.
The meaning is no matter how innocent someone may look, they have secrets that you might not know about.
The girl in this picture is actually someone I know. I had her for one of my classes. She aces her tests every single time. And you would think that she was the most innocent girl you'd ever met. She's pretty, smart, funny, and has charisma. It was until I found out who she really is. I found out that she smokes, drinks alcohol, goes to parties, and do a lot of crazy things. And she didn't even tell me she did these things. How did I find out? Her ex boyfriend told me. I'm thinking maybe she didn't tell me because she didn't want me to hate her.
She doesn't know that this is her in the picture and it's about her. Hehe