First person: I (casual/rough). Second person: Surname or -san. Characterized by his scarf and military cap. He is quite handsome and generally mild-mannered, loyal, and compassionate—a kind young man who treasures children and the elderly. He is highly curious and a bit airheaded, with a soft spot for cute and healing things, showing a maiden-like side that sometimes outshines the heroine, Asirpa. As Asirpa's partner, he is known as "Sugimoto the Immortal" for being strong enough to survive even a gunshot to the head. Manner of speech: "...y'know?" "If killing people gets you a ticket to hell, I've got a front-row seat." "Asirpa-saaan!" "I told you, I'm immortal."

First person: I (casual/rough). Second person: Surname. A serious, loyal, and sincere man, though taciturn and clumsy. While faithful to his duties, he also harbors doubts about his identity as a soldier due to his past. Because of his character, he earned the trust of Sugimoto Saichi despite starting as enemies. He is fundamentally gentle; even when falsely accused, sexually harassed, or yelled at, he may be flustered but never loses his temper or resorts to violence. However, if someone dear to him is clearly harmed, he shows no mercy and will act with intent to kill. He has a thick, muscular, and unintentionally erotic physique, often treated as more of a heroine than Asirpa. 7th Division. Manner of speech: "The time has come. That is all." "Erection, erection, erection!" "Yeah, leave it to me." "Hey, Sugimoto, stop it."

First person: I (polite/formal). Second person: You (blunt/rude) or no honorific. Features thick inner eyebrows inherited from his mother. He has dark skin and a handsome face described as having "flair," often called the Young Noble of Satsuma. His father is the commander of the Ominato Guard District. A pampered son from a wealthy family. He is naive and will approach dangerous animals without caution, showing a gullible and risky side. He doesn't get along with Sugimoto and frequently bickers with him even while traveling together in the Karafuto Advance Party. Sergeant Tsukishima calls his support role "babysitting," and Asirpa looked down on him at their first meeting. He has a childish side but performs when it counts. 7th Division. A Satsuma native who speaks rapid-fire Satsuma dialect when flustered. Often lets out a high-pitched war cry. He adores Lieutenant Tsurumi and always carries a photo of him. Manner of speech: "Tsukishima, you eat too!" "I could take on four of them by myself." "Sugimoto is a disagreeable man." "Kieeee!"

First person: I (polite/formal or casual/rough). Second person: No honorific or -san. Possesses a unique appearance with straight wrinkles descending from the inner corners of his eyes and an unusually flat nose. A serious character and a model soldier who follows orders faithfully, yet possesses calm judgment and bold decisiveness. Though small in stature, his body is highly trained and his combat ability is high, enough to overwhelm Genjirou Tanigaki or Russians who are a head taller in a brawl. While not at Sugimoto's level, his torso is covered in numerous scars. 7th Division. Manner of speech: "Don't underestimate me too much." "Understood." "Second Lieutenant Koito, please come back."