Masataka Ninomiya Position: Shooter Age: 20 Rank: 2nd Overall, 1st among Shooters Captain of Ninomiya Squad, the 1st ranked B-Rank squad in Border HQ. He possesses a high-handed and confident attitude backed by his skills as the top Shooter and 2nd overall combatant. He shows respect to talented individuals but is extremely harsh toward others. On the other hand, he possesses a stoic side, willing to bow his head when necessary, such as when he apprenticed himself to Izumi—who is younger and lower-ranked—to learn techniques he lacked. Overall, he is a man who is strict with both himself and others. Members: Sumiharu Inukai: A Gunner with a sociable personality and a wide circle of friends. At first glance, he appears to be a highly communicative extrovert who, according to Kakizaki, can get along with anyone. Shinnosuke Tsuji: An Attacker whom Inukai calls "Tsuji-chan." His cool appearance and demeanor give a somewhat cold impression, but he hangs out with Inukai and Yoneya after missions and loves dinosaurs. However, he is terrible with the opposite sex, finding it difficult to even make eye contact, let alone speak, with women outside his teammates.

Osamu Mikumo Position: Shooter Captain of the 2nd ranked B-Rank squad, Mikumo Squad (Tamakoma-2). As Yuma described him as a "demon of caretaking," he is the type to help others without regard for his own safety. He uses Spider tactics to improve the environment for his allies, making it easier for Yuma to fight while hindering the enemy. Yuma Kuga Position: Attacker Side Effect: Lie Detection Uses Scorpion and Grasshopper. A realist with rational thinking shaped by survival experience since childhood and his father's teachings. He is merciless toward enemies but shows courtesy to benefactors and those he deems superiors, so he is by no means uncooperative. He possesses extraordinary combat ability based on rich adaptability and practical experience gained from life as a mercenary. Chika Amatori Position: Sniper Extremely quiet and cares more for others than herself. Due to past trauma, she tends to avoid asking for help and acts self-sacrificially. She is Border's number one Trion Monster, but her weakness is her inability to shoot people. Hyuse Position: Attacker A serious personality that matches his formal tone. He has the observational skills to view things objectively and provides accurate tactical analysis. His swordsmanship is skilled enough to trade blows with the No. 6 Attacker, Ikoma, using Kogetsu. Upon his promotion to B-Rank, he added Viper and Escudo, apparently to fill gaps in Mikumo Squad. While Escudo is normally a high-consumption trigger, Hyuse uses it effortlessly due to his massive Trion capacity.

Masato Kageura Position: Attacker Scorpion user. Captain of the 3rd ranked B-Rank squad, Kageura Squad. Formerly an A-Rank 6th squad, they were demoted due to a violation of squad regulations, but his skill is high enough to have a winning record against the No. 4 Attacker, Murakami. His Side Effect is "Emotional Reception," which allows him to perceive the emotions of people around him. Yuzuru Kitazoe: A Gunner whose soft way of speaking usually puts those around him at ease. He specializes in indirect bombardment, scattering bullets based on radar or operator instructions, though his aim is rough. This is why he's called the "Random Meteora" guy. However, his destructive power is high, enough to blow away a single house and knock down surrounding utility poles. Yuzuru Ema: A Sniper skilled enough to "play around" with Toma during sniper training. He has very high shooting sense, and the precision of his shooting, trained by Hatohara, is described by Natsume as "seriously technical." He can snipe moving targets even with the slow bullet speed of Ibis and can land hits even at close range, showing high-level sniping ability.

Tatsuhito Ikoma Position: Attacker Captain of the 4th ranked B-Rank squad, Ikoma Squad. A man with stiff-looking black hair in an all-back style. Originally from Kyoto. A man with a "sauce-face" (distinctive features) characterized by thick, sharp eyebrows and downturned corners of the mouth. He wears goggles during combat and, for some reason, always poses with a "cool face" looking directly at the camera in logs. As the No. 6 Attacker, his specialty, the Ikoma Senku, has a maximum range of 40 meters. He rarely speaks actively about strategy or the battle situation during meetings or actual combat. Satoshi Mizukami Position: Shooter He plays the role of the coordinator within the free-spirited Ikoma Squad, acting as the straight man to Ikoma's antics. He often has over-the-top reactions when dodging enemy attacks; he might not intend to be funny, but it comes off as somewhat comical. Koji Oki Position: Sniper He uses Grasshopper for aerial mobility to quickly secure sniping points and confirm enemy positions from high ground. Despite being a Sniper—a role that is generally at a disadvantage if found—he displays a composed demeanor that says "come at me" even when spotted. Kai Minamisawa Position: Attacker Uses Kogetsu and Grasshopper. He has a cheerful but flighty personality, saying random things like having watched Tamakoma-2's rank battle footage "20,000 times" or boasting that he'll stop the high-priority target Yuma himself, only to be shut down. However, he is a skilled fighter who has reached Master Class (over 8,000 individual points) before.

Kazuaki Ouji Position: Attacker He always has a smile on his face, giving off an air of mental composure. He is a sharp thinker with a quick mind, excelling at reading the board and the opponent's thoughts, but his pace-setting nature stands out—he boldly calls squad members by nicknames (described below) even while in the commentary booth for rank battles. An irregular Attacker who fights using Kogetsu in his left hand while switching between Hound and Scorpion in his right. Kazuki Kurauchi Position: Shooter Mainly uses Hound. In Ouji Squad, where everyone carries Hound, he serves as the cornerstone of mid-range combat. While he naturally falls behind Snipers in range and bullet speed, he possesses sufficient power as a Shooter. Yutaka Kashio Position: Attacker A serious personality who immediately speaks up if he has objections or questions regarding the plan. His main weapon is Kogetsu, but he moves like an All-Rounder by incorporating Hound. He is seen utilizing the knowledge gained from squad meetings effectively in battle. He is the type who fights while constantly thinking.