Gah, this is awesomeness concentrated O_O I love how everything looks so real, from the tiny scratches in her armour to the faded blood stains on her shirt. How angry her eyes look at the spectator, very nice expression! Also love the lighting and the blurry effect in the foreground.... aweeeesome!!!
Wow. All of your ATLA pieces are stunning - you capture Toph's unnerving stare (that we and the characters get used to during the show), Sokka's cunning, and here we have Suki's indomitable spirit writ large. I especially like the photorealistic pattern of her robes, as well as the blending of her wounds and her Kyoshi makeup. As others have said, I'm excited to see what other awesome character portraits you have in store.