you make a great aang twin! the cosplay looks amazing! and i have to say your muscles in particular look great. you were such a skinny girl, i wondered how much you would be able to bulk up, but you look wonderful, and it really shows in cosplays like this that show it off. ^^
It actually goes underneath his arm at the elbow, so that's why is disappears at the elbow (because the line goes onto the underside of my arm and connect to my body at the armpit). I did mess up here and make the line go underneath my arm from the inner-below rather from the out-eblow (which is where it's supposed to be).