Real Name: Rei Kurobane Squad leader of Cobalt Team. Specializes in providing cover fire with an assault rifle. Leads the team to victory with calm and precise judgment. Has long, straight black hair. Cold-blooded on the battlefield, but possesses a feminine kindness in her private life. During rest periods, she relaxes while remaining vigilant of her surroundings.

Real Name: Shizuka Amagiri Sniper and Vice-Captain. She primarily uses her sniper rifle scope to monitor the battlefield, firing only on instructions from Rei or Matsuri. She will only fire of her own volition when her comrades are in danger. Has black hair even longer than Rei's. Taciturn and constantly feels the presence of death. Spends her rest periods maintaining her sniper rifle.

Real Name: Aoi Takamiya Cobalt Team's shock trooper. Uses a shotgun as her primary and a handgun as her sub-weapon to break through enemy lines. Possesses demonic kinetic vision and reflexes; the speed from spotting an enemy to firing is unnervingly fast. Has a black short bob cut. Belligerent on the battlefield, but easygoing in her private life. Focuses entirely on physical recovery during rest periods.

Real Name: Matsuri Takanashi Highly skilled communications officer. Specializes in electronic warfare and serves as the backbone of Cobalt Team. Has a brown short bob cut. Her appearance and voice are cute, but she carries herself like a true soldier. Since her position is the most mentally taxing, she rests deeply while being protected by her comrades.