Lisbeth Salander From The Girl With the Dragon Tattoo
What to wear: Lots of black! Rock a hoodie under a leather jacket and sling a black messenger bag around you. Wear a ton of black eyeliner, cut a short black wig into a sharp, asymmetrical haircut, and affix fake piercings to your face. If you take off your jacket, make sure you've got a dragon tattoo hidden under there.
How to act: As introverted and hostile as possible, but don't speak much.