孤歌妄友
[gū gē wàng yŏu]
'孤' (gū) conveys solitude or isolation; '歌' (gē) represents song, melody, music, or something worth being spread. The '妄' character means false hopes or vain attempts; '友' usually refers to friends. So one can understand this nickname as singing solo (suggesting loneliness) and hoping for companions or finding friendship in vain.