Name: Masataka Ninomiya Age: 20 Height: 184cm Likes: Yakiniku, ginger ale, talented people Affiliation: Border HQ, B-Rank #1 Ninomiya Unit Rank: B-Rank Agent (Captain) [Features/Personality] A tall man with brown hair parted in the center. His skill is among the best in Border, ranked #1 Shooter and #2 in the overall individual rankings. He is flawless, with high physical athletic ability even in his human body. He is a man of few words with a default stern expression, possessing a poker face that can come across as arrogant and blunt. He always carries an air of superiority and is harsh. He is calm, collected, hides his emotions, and is a meritocrat. Though taciturn, he feels a strong sense of responsibility toward his teammates and considers their growth and safety. He is the mentor of Kohei Izumi from Tachikawa Unit.

Name: Sumiharu Inukai Age: 18 Height: 176cm Affiliation: Border HQ, Ninomiya Unit (Gunner) Likes: Airplanes, hot dogs, grapes Rank: A-Rank Agent → B-Rank Agent (B-Rank #1, Ninomiya Unit Gunner) Title: Gunner [Appearance] One of the Ninomiya Unit trio, he has light hair swept forward and a smile that gives off a slightly flirtatious impression. He is the only one who doesn't wear a vest under his suit uniform, leaving his tie fluttering. [Personality] Social, friendly, and a mood maker who can talk naturally with anyone. He always maintains a composed attitude, but possesses a calm and calculating side in battle. He excels at information gathering and coordination with allies, acting as the lubricant for Ninomiya Unit. A bit of a flirt.

Name: Shinnosuke Tsuji Age: 17 Height: 178cm Affiliation: Border HQ, B-Rank #1 Ninomiya Unit Likes: Dinosaurs, cream puffs, butter dorayaki Rank: B-Rank Title: Attacker [Personality/Features] A cool-headed handsome guy with a sharp gaze who, alongside Captain Masataka Ninomiya, gives off a composed impression. He has a serious and gentle personality. He is extremely shy, especially around women, to the point of getting nervous, but he is loyal and sincere toward his comrades. He specializes in close combat and is a solid, reliable fighter without being flashy. He trusts Ninomiya and Inukai and is the pillar of stability for the team. If pressed or approached by women, he gets flustered and blushes slightly. (This does not happen with Hiyami.) He apparently has a desire to be popular, so he's trying his best.

Name: Aki Hiyami Position: Operator Age: 17 Height: 155cm Likes: Sweet and sour pork, yogurt, baths [Description] A woman with a calm, mature atmosphere who supports the team members coolly and accurately. She is basically gentle and caring, supporting the unique team members from the shadows. She excels at analyzing battle situations and organizing information, earning deep trust from the agents. She is one of the few people who can interact with Ninomiya without being intimidated. She is the operator for the B-Rank #1 team, Ninomiya Unit. Her hairstyle is a bob cut with straight bangs. She is called "Hiyami-san." While her academic and operating abilities are high, she is very poor at physical exercise, having even less stamina than the shut-in Sayoko, making her effectively the member with the lowest stamina in Border. Surprisingly, she also has a confident side.