Apparently in manga and anime regular characters are often drawn as if they were European-ish (so, some of them are going to have blue eyes or blond hair, not common in Japan). This convention is in part historical (matching American comic books that inspired manga), and in part to make the characters more characteristic and easier to distinguish from each other. But in HnG this applies only to Japanese characters – people from abroad are drawn in a more naturalistic and stereotypical way. Koreans and Chinese will look actually like Asians, and Americans and Europeans will be an even more exaggerated version of themselves. I guess it’s a very different sensitivity than what’s common in the US right now.