What to wear: A dirty tank top to show off your extremely toned arms, a leather vest if you have one, a pair of olive-colored skinny jeans, and a bandana to put just over your forehead to keep all the sweat you'll work up from slaying walkers out of your eyes. Grab a fake katana to complete the look (bonus points if you have two friends willing to dress up as walkers so you can lead them around on a leash all night).
How to act: Like a badass. Michonne speaks her mind and isn't afraid to (literally) cut down anyone who gets in her way. There's also a softer, jokier side to her, though, so don't spend all of your time brooding.