If you're looking for female skins, I find Fleur's Shoujo skins to make Siyu look unmistakably Asian. They're specifically shaded to have no eyelid fold and to have soft and rounded shading on the nose, and they're just beautifully done. Skin Within also has an Asian skin called Alaysia, but I couldn't get it to look quite right on my shape.
Blowpop's Mellie 2's (not even sure if they're still available, but if they are, they'll be dirt cheap) work nicely because they don't have eyefolds either, but the look would definitely be more Americanized depending on your shape
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