This picture is simple but proves its point nicely.

AT first I was just sketching heads in different poses, but then I drew both girls' hairstyles on each picture, and now I think it demonstrates perfectly the difference between Nagala and Misara (physically) is for the most part just their hairstyles heheheh. (For those who don't know their story, the best way to think of it is that they're identical twins, but the reality is that they're two halves of a single person -- a single soul with two bodies. Quite nifty~ ;P )