路人甲炮灰乙
[lù rén jiă pào huī yĭ]
This username reflects a feeling of insignificance and being easily replaceable, as “路人” (lu ren) means a passer-by or someone unremarkable, and “炮灰” (pao hui) translates to 'cannon fodder'. It indicates a person who feels like just another expendable character in life's drama.