Caveat: this is a joke

You can't call 'em Asian, that's racist. There is no Asia in the Final Fantasy worlds, so by likening them to Asians, all you're doing is saying "well Asian people do THIS, so this guy MUST be Asian", when the character isn't even from Earth at all. Square seems to be going with the name Hume for the humanoid race of the Final Fantasy games, differentiating them from Humans, so they don't correspond to Human ethnicities at all.