What to wear: Kylo rocks black leather pants under a long, hooded black robe. Cover your face in a black mask, but when you pull it off, shake out your glorious hair. Pick up a premade stormtrooper mask, and then pair it with a white T-shirt, white pants, and white sneakers.
How to act: For Kylo, act like you're being pulled by two different sides constantly. Also, kind of a pouty brat. If you're a stormtrooper, be silent and menacing.