回忆是刀它让我遍体鳞伤
[huí yì shì dāo tā ràng wŏ biàn tĭ lín shāng]
The name translates into 'memories are knives which cut me until my body is covered with scars'. It conveys a message where recalling the past causes severe mental agony. Memories once beautiful turned out bitter later because those past events were full of painful stories. Thus this nickname demonstrates a deeply troubled soul that cannot recover even when trying hard to move forward.