Whoever she is, she is cosplaying character Type-95 from Girls Frontline.
Reason: The white themed cosplay is from Type 95 "White Cicada" artwork.
The schoolgirl themed cosplay also shows the Type 95 accessory on her right thigh.
...and of course the weapon....

*FOLLOWUP EDIT*
She may be 夏鸣蝉 "Xia Mingchan" who has a number of cosplay pages.

Last edited on 22 April 2020, 13:17.

Base +16, Marisa Kirisame +8, LoveYayoi +6, kananath +7

There is some weird photoshoppery going on whenever she shows cleavage

Base +1, Malindros -6, kananath -7, Poubelle1 -5, blackscorpion312 +15

高ping战士

Base +2, kevinfllay +6, enterthename +6

第一套贼费。这个妹子不适合齐刘海。看着没有美感。第二套反而看着比较带些清新感

Base +3, 02零贰我老婆 -2, voyagerhzz +4

个人觉得穿的多反而更好看了。

Base +6, liye8 +1, voyagerhzz +4

表情管理不行导致有时候面目很狰狞

Base +2

Type 95 - Summer Cicada

Base +25