马尾菇涼女汉子短发菇涼萌妹子
[mă wĕi gū liáng nǚ hàn zi duăn fā gū liáng méng mèi zi]
This username combines different elements to describe a unique personality. 'Ma Wei Gu Liang' means a girl with a ponytail, and the contrasting characteristics of being tough ('nü hàn zī,' or 'female tough person') yet cute at the same time (a short-haired but adorable girl).