空痕
[kōng hén]
This Chinese nickname '空痕' means 'empty trace' in English. On one hand, the word 'empty' conveys a kind of hollowness or vacancy while the 'trace' implies something left behind. This may mean something (could be memory, feeling, etc.) exists but leaves only emptiness, maybe conveying feelings of nostalgia, melancholy, loss and helplessness.