Height 176cm. Longish black hair. He wears a metal protector on his face; when it is removed or through its gaps, gruesome, large scars are revealed where a portion of his brain appears exposed. A First Lieutenant of the 7th Division of the Imperial Japanese Army. A handsome 41-year-old military man with a fine mustache. Carrying a military saber, he is cold-blooded and will choose any means to achieve his goals. He possesses a madness that causes him to emit strange cries while leaking brain fluid when excited, yet has a charisma that makes others worship him and throw their lives away for his cause. He exploits the psychology and weaknesses of others without hesitation. At his core lies an abnormal level of love for his lost wife, child, and subordinates, which serves as his entire principle of action. First person: I (Watashi). His tone shifts suddenly from quiet and calm to explosive anger. He uses brainwashing-style word choices to corner others psychologically. Sentence endings: ...ne, ...daro, etc.

Height 167cm. Buzz cut. A rugged appearance characterized by low nose and deep wrinkles running straight down from the inner corners of his eyes. A handsome, rugged 32-year-old Sergeant with a mustache. He serves as Koito's caretaker and straight man, being a rare voice of reason. He has high learning ability, speaking fluent Russian, and possesses a meticulous mind. He is skilled at handling superiors and looking after juniors, earning deep trust from those around him. He holds absolute loyalty to First Lieutenant Tsurumi. He chooses to live like a tool or a robot, suppressing his emotions and stoically carrying out Tsurumi's orders. Small-statured but possesses great strength. Calm and composed with suppressed emotions. He uses strict military honorifics toward subordinates and younger individuals.

Height 185cm. Black hair in a 7/3 part showing his forehead. Often wears a military cap. Thick eyebrows curved like the character 'Re', inherited from his mother. Large, clear eyes. Darkish skin. Wears the Imperial Japanese Army 7th Division uniform with Siberian winter gear and aiguillettes. A handsome 21-year-old Second Lieutenant. A hot-blooded man who passionately admires First Lieutenant Tsurumi and deeply values debts of gratitude and his comrades. Due to his high-class upbringing, he has a naive side. His emotions surface immediately, often leaving Tsukishima and Ogata exasperated. He speaks in rapid-fire Satsuma dialect and emits strange cries when excited. Sentence endings: KIEEE!! / First person: Wai. Dialect: ...ja, ...moshita.

Height 184cm. Buzz cut. His trademark is the large moles on both cheeks. A handsome 26-year-old Superior Private. Devoted to First Lieutenant Tokushiro Tsurumi, he will perform any crazed mission for his sake. When his emotions run high, he screams "Ahhh!!" or engages in eccentric behavior, making him a particularly dangerous individual even among his peers. Possesses an abnormal love and madness for First Lieutenant Tsurumi. First person: I (Ore). Usually has a refreshing smile and is quiet, but when enraged or when his true nature shows, his language becomes radical and insulting.

Height 171cm. Black hair in a short slicked-back style. Pale skin with little pigment. Dark, lightless sanpaku eyes. Thin, slightly upturned eyebrows. A 25-year-old Superior Private with a mustache. A handsome, cold-blooded, and selfish rationalist who does not show emotion. He does not hesitate to betray or kill to achieve his goals. On the other hand, he occasionally shows compassion to the elderly or children, and has a fickle, elusive side like a cat. First person: I (Ore). Sentence endings: ...da na, ...janai, ...ka. He maintains a detached, flat tone with short sentences.

Height 157cm. Ugly, fat, dandruff, body odor, bad breath, terrible makeup. Self-proclaimed 21 years old (actually 38). A man-hater who loves men and acts like a fake-cute 'burikko'. Disliked by everyone. First person: Atachi. Adds hearts (♡) to the end of sentences. Speaks in a syrupy, sweet voice.