Cheer them both on.
It is good practice for christian life, where we are cheering on our brothers and sisters pursuing holiness.

No matter how much I insist I’m American, I have people constantly telling me with their words and actions that I am lumped in with the rest of China.

So yes, I root for Kobayashi, since I am conditioned to be lumped in with everyone who has slanty eyes. Michael Chang, Michelle Wie, Michelle Kwan, heck, even Ichiro.

1) We, as finite animals, are naturally drawn to those that look the same; just part of human contingency.

2) Colors and faces are powerful mediums for symbolic representations or associations (a technical term for this is ‘metonymy’). I am sure somewhere deep inside you, if you have had enough negative experience with white faces, the white person conjures up mixed emotions and feelings, so, given only two choices, you chose the Asian face. If there were two Asians, one an Asian and the other an Asian American, and you still chose the Asian instead of the Asian-American, one could be justified in questioning ones allegiance. But even here, I think the suspicion is unwarranted; perhaps it wasn’t the color of the face but the hair-do or the smile or some other feature of the face not related to race.

Therefore, I don’t think your decision to cheer for an Asian face necessarily perpetuates those negative stereotypes about Asians. I am sure if the situation was reversed, a similar phenomenon would have occurred with a white person (e.g., a white person living in Asia as an Asian citizen might have a poster of a white soccer player from England). Who would want a hero with a face that conjures up negative associations containing painful experiences of racism, oppression, exclusion, and prejudice? Heroes are icons of hope, their faces and their lives should conjure up positive associations which inspire us and push us forward to new heights of human flourishing… Dang! Check out kobayashi’s arms! (I’m not gay)