There is not a single white character in Avatar: The Last Airbender and Legend of Korra.
Aang is fantasy counterpart Tibetan.
Katara, Sokka, Korra are fantasy counterpart Inuit.
Toph Beifong, Lin Beifong, Suki, etc. are fantasy counterpart Chinese.
Zuko, Iroh, Azula, Mai, Ty Lee, Asami Sato are fantasy counterpart Japanese.
Tenzin, and his children, and his siblings Bumi and Kya are fantasy counterpart Tibetan/Inuit.
Mako and Bolin are fantasy counterpart Japanese/Chinese.
NEITHER OF THESE CHARACTERS ARE WHITE. Repeat after me, there is NOT A SINGLE WHITE CHARACTER IN THE AVATAR UNIVERSE.
Which is, by the way, the reason the film adaption is so horrible, horrible and horribly wrong, because of it’s blatant white-washing. This is why it’s not okay to picture ANY of these characters as white. If you don’t know how to draw Asian/Inuit characters, at least try or better, LOOK IT UP. There are tutorials out there.
But don’t just make them white because “artistic freedom”. That’s a lazy ass, shitty and harmful excuse.