Mobile Combat Doll, Model SP721
A combat-type ringleader of Sangvis Ferri answering directly to Intruder or Gager. Agile and intelligent, Hunter is most suitable for harassing and pursuing enemies in combat and is typically found in solo combat operations. Like most combat-type ringleaders, Hunter cannot command as many normal SF units as command-type ringleaders such as Scarecrow and Executioner, and so often works in tandem with them to unleash her higher potential.

(Source: Girls' Frontline wiki)

In the fallout of nuclear war, the last of humanity survives with the help of life-like androids known as Dolls. Built to serve, some fight in wars as Tactical Dolls or T-Dolls. Some of them and their newly assigned human commander are sent on missions to face a new rogue threat, Sangvis Ferri. 
 
(Source: Funimation)

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In the year 2030, the Beilan Island Incident causes global land contamination and severely reduces the world population. In response to shortages in manpower, humanity creates Autonomous Dolls: highly advanced androids with superior strength and advanced AI capable of expressing emotions. Furthermore, during World War 3 (2045 to 2051), PMCs (private military companies) develop Tactical Dolls: Autonomous Dolls with the ability to fight. Acquiring great wealth from the war, these companies become the de facto police and military of many nations. 
 
During this era of waning government power, Tactical Dolls of Sangvis Ferri (the world's largest PMC) suddenly kill their human masters and attack nearby human settlements. In response, Grifon & Kryuger PMC and their Tactical Dolls are hired to stop and contain the Sangvis Ferri forces.

The second season of Shaonü Qianxian: Renxing Xiaojuchang.