我是当年不言不语的路人甲
[wŏ shì dāng nián bù yán bù yŭ de lù rén jiă]
Implies nostalgia and reflection on oneself as insignificant but memorable part of others’ stories in the past. Like an unnoticed 'passer-by A', the user wishes anonymity while hoping their presence had left some trace on others’ memories