Sangvis Ferri bunker
<tn><i>Sangvis Ferri</i> androids are the enemy characters in the world of Girls' Frontline.
Sangvis Ferri was the biggest android manufacturer and developer in the world, but after World War 3, a devastating incident made Sangvis Ferri's AI core go FUBAR and murdered all of its human employees.
Operating under AI order, the once trusted Sangvis Ferri androids are now transformed into blood thirsty killing machines, relentlessly hunting others.</tn>
-upgrade!
<tn>Gun girls in Girls' Frontline are military androids with a "core". When you remove the core of a gun girl to upgrade the others, the coreless girl will lose her "T-Doll" status and return to being a civilian, leaving your base.
Similar to scrapping in Kantai Collection and Zhan Jian Shao Nyu, but "scrapping" weapon girls won't destroy her and won't yield common resources.</tn>
