萌系小妹纸
[méng xì xiăo mèi zhĭ]
'萌(meng)' refers to 'kawaii'/cute, typically representing cuteness and youthful innocence, commonly admired quality especially in anime, comic cultures. The user might have adopted a kawaii style and portrays an innocent little sister image online, aiming for creating friendly interactions on internet platforms by utilizing such a sweet identity.