姐的气质一般女人比不起
[jiĕ de qì zhì yī bān nǚ rén bĭ bù qĭ]
This online name suggests that the user believes she has a unique charm and grace that other women can't match. It shows a sense of confidence or arrogance. In modern China, many young females like to call themselves 'sister' which implies a bit mature than their age, and this netizen might be using 'Jie'(sister) for the same reason.