KCCO was a Russian, later Neo-Soviet strategic-level special forces command and a subbranch of the Neo-Soviet Army, and later turned rogue military force. Originally a supporting faction, they quickly became the second antagonistic faction of Girls' Frontline. Uses robots as soliders.

Sangvis Ferri Industrial Manufacturing Company, usually called Sangvis or SF, was a Romanian arms manufacturer created in 2031, later turned violent non-state actor, acting as the first antagonistic faction of Girls' Frontline. Uses T-dolls and small robots as soliders.

Paradeus is a German violent non-state actor described as a terrorist group and a cult. It acts as the third antagonistic faction of Girls Frontline introduced in Continuum Turbulence. Uses Nyto and small robots as soliders.

AK-15 on the other hand is usually pretty quiet, until she gets a chance to fight some targets.

She's most of the time seen with a mysterious smile, but becomes quite serious and cautious in combat.

AN94 is a pretty quiet and cute girl.

Nyto is same as T-dolls.

Griffin and Kryuger Private Military Company and Security Consultant Company or Грифон & Крюгер (Grifon & Kryuger) in Cyrillic, usually called Griffin or G&K, is a private military company founded in 2053 by former Ministry of Internal Affairs officer Berezovich Kryuger and Rossartrist agent Griffin Lyons, and is the main protagonist faction of Girls' Frontline. Uses T-dolls as soliders

Task Force DEFY is an elite Tactical Dolls team led by Angelia and assembled in 2063. Works with Griffin. Regular members are newer elite models of Tactical Dolls capable of great autonomy in the field, hence the name of the team, and they form the most effective combat squad in the Neo-Soviet Union. To those who heard about their existence, they are known as the “Wolf Pack” of the most elite T-Dolls, with AK-12 as the alpha. in DEFY there is AK-12, AK-15, AN-94 and RPK-16.