What to wear: Honestly, you could just cut holes in the side of a large potato sack for your arms and you'd have something akin to the High Sparrow's raggedy dress. If you don't have a potato sack lying around (understandable), just throw on your baggiest, drabbest light-coloured clothes and get yourself a white wig. Go barefoot if possible, and carry a book around with the Faith of the Seven's seven-pointed star carved into it (or better yet, ask your friend to wear a black robe and paint the symbol on their forehead and follow you around all night).