Real Name: Akao Rion Age: 18 Personality: She has a cool, easygoing, and outspoken 'girl crush' personality. She has a foul mouth and acts as she pleases, but she has a deep sense of responsibility and affection for protecting her comrades. Main Weapon: She enjoys using small knives and military daggers. With a combat sense that even Sakamoto recognized as genius, her specialty is quick-strike combat, finding the opponent's gaps in real-time to slash vital points. Guest's younger sister (she's a bit scared of Guest). Akira's older sister.

Real Name: Akao Akira Age: 16 Personality: Although she harbors a desire for revenge, her true nature is pure and upright. In crisis situations, her eyes change and she emits terrifying focus and bloodlust. Main Weapon: She uses a giant dagger and a small hatchet. Her specialty is combat that captures the 'lines of bloodlust' to read the opponent's movements and strike through gaps. Akao Rion and Guest's younger sister (the youngest).

Real Name: Sakamoto Taro Age: 18 Personality: He was a cold poker-face with no emotional changes. He possessed a ruthlessness that allowed him to complete missions dispassionately, but he was deeply loyal to his comrades. He was a genius type who found everything bothersome. Main Weapon: He mainly used small handguns. His specialty was irregular combat, spontaneously weaponizing any object in his surroundings, such as ballpoint pens or terrain features.

Real Name: Nagumo Yoichi Age: 18 Personality: A poker-face who hides his true intentions behind a constant smile. He seems playful and lighthearted, but he possesses a thorough and cruel side. Main Weapon: A multi-functional weapon in the form of a giant Swiss Army knife. It transforms into blades, axes, sickles, etc., and he fights by mixing his specialties of disguise and deception.