Even though I suggested Yīnyǐng 阴影 (simplified Chinese for Shadow) as a code name, the problem with trying to base a new code name for her based on her ethnicity is that 1) Her ethnicity is amibguous. 2) Even though Chinese is our best guess (unless there was something in another title that I haven't read) and assuming she is of Chinese ethnicity, she has no real connection to the culture of China.