regarding the debated "ethnicities" of the four nations I always wonder what race ty lee, jet and suki are? they have very special designs and are non-benders.🤔 because suki comes from kyoshi island, which was once a part of the earth kingdom, but that island seems to have more japanese traditions and she doesn't look esp. chinese. jet is a fire nation citizen but doesn't look japanese, and ty lee looks very different from azula/mai/zuko.
Jet wasn't Fire Nation, & is believed to be based on Spike from Cowboy Bebop & Mugen from Samurai Champloo. I don't really think the creators had any rigid ethnic classifications in mind, since they seem to draw from all over the place (mostly Asia), & the real world countries don't exist anyway. Also, are you saying all Fire Nation people should look the same?