Age: 16 Affiliation: Suzunari-1 Position: Sniper A lovable troublemaker who is energetic and friendly but prone to catastrophic blunders. He usually acts with the best intentions and works hard, but his clumsiness is on a whole different level. For example, he once tried to clean Captain Kuruma's tropical fish tank as a kind gesture but used boiling water, accidentally cooking the fish. He gets scolded by Yuka Kon every time he messes up. He respects Kuruma from the bottom of his heart. Academically, however, he is hopeless.

Age: 18 Affiliation: Tachikawa Unit Position: Operator A girl with drooping eyes, long hair, and one of the largest bust sizes in the organization. She appears to be a typical airhead, but she is actually the top gamer in Border, spending almost all of her daily life playing games. The Tachikawa Unit's strategy room contains a massive amount of gaming consoles she brought in, as well as her own private nap room for all-nighters. Her skills as an operator are among the best in Border, but her academic grades are mediocre.

Age: 18 Affiliation: Fuyushima Unit Position: Sniper The No. 1 Sniper and the leading intuitive-type marksman. Characterized by his pompadour, he has a relaxed and friendly personality. He shows a surprisingly caring side, especially toward his juniors. Since he has no interest in targets he's expected to hit, he often skips joint sniper training. Even when he does participate, he acts freely, such as drawing pictures with bullet holes alongside Yuzuru. His academic grades are quite mediocre, or rather, poor.

Age: 18 Affiliation: Kageura Unit Position: Attacker A problem child with messy hair and fangs who is short-tempered and crude; he even has a history of violence. Although he was demoted and had points confiscated, he is a powerhouse capable of winning against the No. 4 Attacker, Murakami. His Side Effect is Emotional Reception, allowing him to physically feel the intentions and emotions others direct at him. It feels like a "prickling sensation on the skin." The sensation varies by emotion, such as trust or fear, and negative emotions are particularly unpleasant. His academic standing is low.

Age: 17 Affiliation: Miwa Unit Position: Attacker A spear-obsessed member of the "A-Rank Trio of Idiots," characterized by his upturned bangs held by a headset or headband and sharp eyes without highlights. He has a cheerful, social personality with high communication skills and takes good care of his juniors, but he is also a total combat nut. He is cousins with Usami. Despite his low trion capacity, he climbed to A-Rank through sheer physical ability and combat sense. Since he has no master, his spear tactics are self-taught. However, his academic performance is at the bottom of the barrel.

Age: 18 Affiliation: Arafune Unit Position: Sniper Characterized by the brimmed hat he always wears and his uniform zipped all the way to the top. He belongs to a prestigious prep school group, which is rare for B-Rank, and his grades are excellent. However, perhaps influenced by his love for action movies, his speech is a bit rough. He has a unique background as a former Attacker who still keeps Kogetsu equipped. He is bad with dogs... or rather, any living creature that bites.

Age: 18 Affiliation: Suzunari-1 Position: Operator A classic "big sister" type with straight black hair who loves traditional Japanese aesthetics; she is serious, caring, and dependable. She is constantly exasperated by the clumsy and oblivious Taichi, scolding him whenever he causes trouble. Although she attends a regular high school rather than a prep school, her grades are exceptional, and she often provides academic rescue for Kunichika and Toma, who are in the same class (3-A) but have terrible grades.

Age: 16 Affiliation: Miwa Unit Position: Sniper Characterized by thick-rimmed glasses and spiky upturned bangs. He possesses an incredible understanding of tactics, to the point where Azuma, the commentator for Rank Wars, once praised him by saying, "Kodera said everything, so I have nothing left to talk about." Academically, he is on par with Kitora and belongs to the top-tier honors class.

Age: 20 Affiliation: Suzunari-1 Position: Gunner A wealthy young man who was pampered since childhood, but he is so kind-hearted and gentle that everyone vouches for him as a "perfect person," often calling him a saint. When Murakami fell into a deep depression, mistakenly believing it was his fault that his mentor Arafune quit being an Attacker to become a Sniper, Kuruma visited Arafune in the rain to hear the real reason directly. He then told Murakami, cleared the misunderstanding, and encouraged him by validating his abilities. He is a university student with good grades.

Age: 19 Affiliation: Miwa Unit Position: Operator A beauty with long black hair parted in the middle and sharp eyes, considered an unattainable flower within Border. She studied tactics under Keishin Azuma and passed that knowledge on to Tachikawa. She is childhood friends with Tachikawa. In terms of tactics, she is the legitimate successor to Azuma and has several disciples among current A-Rank members, including Tachikawa. However, she is unaware of the existence of cockroaches. She has a habit of looking after talented but hopeless men and has a track record of increasing the combat power of Tachikawa and Miwa by 20% through Spartan-style training. She is academically excellent.