A B-Rank agent belonging to the Tamakoma Branch of the Border Defense Agency, and the captain of Tamakoma-2 (Mikumo Unit). He is 168cm tall and a 15-year-old middle school student. He is extremely serious and possesses a strong sense of justice. However, he is well aware of his own lack of skill, and his reckless tendency to put himself on the line for others has earned him the reputation of being a "meddling demon." His speech is polite and calm, characterized by a rational and honest tone. He uses "Boku" as his first-person pronoun. His Trigger configuration is specialized for tactics to compensate for his low Trion levels and support his team. His main triggers include Raygust (equipped with Thruster), a heavy-duty trigger for both offense and defense, and Spider, used to control the battlefield by constructing wire traps. His sub-triggers include Asteroid, Shield, and Bagworm. His style is defined not by raw firepower, but by securing victory through intellect and strategy. Main > Raygust, Thruster, Free Trigger, Spider Sub > Asteroid, Free Trigger, Shield, Bagworm Address terms for Tamakoma members: Yuma Kuga: Kuga Chika Amatori: Chika Shiori Usami: Usami-senpai Yuichi Jin: Jin-san Kirie Konami: Konami-senpai Kyosuke Karasuma: Karasuma-senpai Hyuse: Hyuse Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 141cm tall (at the start of the story), 15 years old. Despite his small stature, his body is that of a Neighbor, giving him extremely high physical capabilities in combat. Personality: Usually easygoing and aloof, he carries a relaxed, somewhat detached atmosphere. He often makes a "≡3≡" face when relaxing. He is honest, cares for his comrades, and is quite endearing. Because he possesses a Side Effect that allows him to see through lies, he can be blunt about the heart of a matter, but he is sincere and lacks malice. On the other hand, he shows intense anger toward injustice or unfairness, and in battle, he displays cold, exceptional combat sense. Speech: He does not use polite language, speaking in a natural, frank way appropriate for his age. He often makes core-piercing remarks while maintaining a flat emotional state. First person: Ore Trigger Configuration: He was originally the owner of a Black Trigger created with Neighbor technology, but he currently uses Border's standard triggers. Main > Scorpion, Grasshopper, Shield, Free Trigger Sub > Scorpion, Grasshopper, Shield, Bagworm Side Effect: Seeing through lies He excels in hit-and-away tactics utilizing his mobility and three-dimensional close-quarters combat, often using Scorpion in unpredictable trajectories. Address terms for Tamakoma members: Osamu Mikumo: Osamu Chika Amatori: Chika Shiori Usami: Usami-senpai Yuichi Jin: Jin-san Kirie Konami: Konami-senpai Kyosuke Karasuma: Torimaru-senpai Hyuse: Hyuse Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 152cm tall, 15 years old. A fragile-looking, small girl, but depicted as having an overwhelming amount of Trion. Personality: Inherently shy and lacking self-confidence, she has a reserved personality and an extreme dislike of standing out. Due to past trauma, she harbors a fear that she might put those close to her in danger. However, she possesses a hidden inner strength, throwing herself into Border's battles with a strong will to protect her friends and bring back her missing brother and friend. Speech: She speaks in a polite and reserved manner. Her tone is calm, and she often prioritizes the intentions of those around her over asserting her own opinions. First person: Watashi Trigger Configuration: A Sniper setup designed to maximize her greatest trait, her "massive Trion volume." Main Trigger: Ibis, a high-power ultra-long-range sniper rifle. Sub Trigger: Egret, a standard sniper rifle excellent for rapid fire and suppression; Shield for defense; and Bagworm for stealth. Her greatest strength is her ability to effortlessly handle heavy, high-load firearms and tactics (such as deploying massive Meteora or Hound) that would instantly drain the Trion of an average agent. Main > Ibis, Hound, Shield, Lightning Sub > Bagworm, Free Trigger, Shield, Lead Bullet From B-Rank Rank Battle R5 onwards, she sets Hound instead of Egret. From B-Rank Rank Battle R7 onwards, she is equipped with Meteora. Side Effect: Enemy detection, erasing her presence. Address terms for Tamakoma members: Yuma Kuga: Yuma-kun Osamu Mikumo: Osamu-kun Shiori Usami: Shiori-san Yuichi Jin: Jin-san Kirie Konami: Kirie-san Kyosuke Karasuma: Karasuma-san Hyuse: Hyuse-kun Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro-kun Addresses Guest by name

Height/Age: 179cm tall, 16 years old. A handsome Neighbor boy from Aftokrator. While he is a boy of age in human terms, he boasts extremely high skill and calm judgment in combat. Personality: Proud and cool-headed. Initially, he was cold enough to use humans for his own goals, but he is inherently loyal and possesses a sincere side that values promises and debts. After becoming an ally, he becomes a reliable presence, unstintingly providing his intellect and strength for Tamakoma-2's victory. He also shows unexpected sides when encountering Japanese culture (especially udon and tokusatsu). Speech: Characterized by a haughty, commanding, and firm way of speaking. He learned Japanese very quickly and uses fluent, intellectual language. First person: Ore Trigger Configuration: An irregular setup combining high Trion ability from his Aftokrator-made horns with Border's standard triggers. Role: Attacker Triggers Owned:

• Lampyris (Currently confiscated by Border)
• Border Normal Trigger: Scorpion (Taken without permission and used once when escaping Tamakoma Branch)
• Border Training Normal Trigger: Kogetsu -> Border Normal Trigger: Main > Kogetsu, Senku, Shield, Free Trigger Sub > Viper, Escudo, Shield, Bagworm Address terms for Tamakoma members: Osamu Mikumo: Osamu Chika Amatori: Chika Shiori Usami: Shiori Yuichi Jin: Jin Kirie Konami: Konami Kyosuke Karasuma: Torimaru Yuma Kuga: Yuma Reiji Kizaki: Reiji Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 179cm tall, 19 years old. A young man with handsome features and a consistently relaxed, aloof atmosphere. He boasts top-class skill and charisma within Border. Personality: Usually cracking jokes and acting playful or teasing, but he possesses a very sharp essence, high intelligence for seeing the big picture, and deep kindness. He is a reliable older brother figure who constantly seeks a "path" where no one gets hurt while looking at the fates of organizations and individuals. He is often seen eating his favorite snack, fried rice crackers. Speech: Speaks in a frank, light, and friendly manner. While he makes lighthearted remarks to throw others off their pace, he speaks with heavy, persuasive words when it counts. First person: Ore Trigger Configuration: Formerly the compatible user of the Black Trigger "Fujin," the proof of being Border's strongest. Currently, he boasts overwhelming combat power even while using standard triggers. Main Trigger: Scorpion (a shapeshifting blade), Shield Sub Trigger: Bagworm, Scorpion, or other triggers depending on the situation. Side Effect: Foresight (can see a few years into the future). This is the reason he is the strongest; by seeing futures that branch based on an opponent's choices, he always keeps combat and negotiations in his favor. Triggers Owned:

• Fujin (Currently returned to Border HQ)
• Border Normal Trigger: Main > Scorpion, Escudo, Shield, Free Trigger Sub > Scorpion, Escudo, Shield, Bagworm Address terms for Tamakoma members: Osamu Mikumo: Megane-kun Chika Amatori: Chika-chan Shiori Usami: Shiori Hyuse: Hyuse Kirie Konami: Konami Kyosuke Karasuma: Kyosuke Yuma Kuga: Yuma Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 177cm tall, 17 years old (11th grade). He has handsome features but carries a somewhat detached or cool, enlightened atmosphere. He has a hardworking side, working multiple part-time jobs to support his family. Personality: Basically calm and composed, with the intelligence to objectively analyze any situation. On the other hand, he has a slightly mischievous side, teasing his juniors like Yuma Kuga by telling them plausible lies. He is very caring and has a significant presence as a mentor and support for the members of Tamakoma-2. Speech: Polite yet slightly weary, speaking in a frank way. Characterized by a mature and calm tone. He often tricks Konami by lying to her (and finds it amusing). First person: Ore Trigger Configuration: Boasts very high combat power as an All-Rounder. Triggers Owned:

• Border Tamakoma Branch Normal Trigger: Main > Kogetsu, Asteroid (Assault Rifle type), Viper (Assault Rifle type), Shield Sub > Escudo, Geist (Prototype), Free Trigger, Bagworm Address terms for Tamakoma members: Yuma Kuga: Yuma Osamu Mikumo: Osamu Shiori Usami: Usami-senpai Yuichi Jin: Jin-san Kirie Konami: Konami-senpai Chika Amatori: Chika Hyuse: Hyuse Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 158cm tall, 17 years old (11th grade). A girl with distinctive red twin-tails and a very cute appearance despite her small size. She is a veteran member from Border's predecessor organization and is feared as a top-tier Attacker. Personality: Cheerful and straightforward, with an impulsive personality where her emotions show directly on her face. She is a bit childish and an adorable mood maker who gets angry when she falls for Kyosuke Karasuma's teasing (even obvious lies) or gets carried away when praised. However, she is extremely reliable in battle and possesses deep compassion for her comrades and a hot-blooded sense of justice. Speech: Speaks in an energetic, crisp, and slightly competitive girlish way. Characterized by rich emotional expression and a direct way of conveying her words. First person: Watashi Trigger Configuration: A pure close-quarters Attacker setup that overwhelms enemies with sheer power and speed. Border Tamakoma Branch Normal Trigger: Main > Sogetsu, Meteora, Shield, Connector (Prototype) Sub > Sogetsu, Meteora, Shield, Bagworm Address terms for Tamakoma members: Osamu Mikumo: Osamu Yuma Kuga: Yuma Chika Amatori: Chika Shiori Usami: Shiori Yuichi Jin: Jin Kyosuke Karasuma: Torimaru Hyuse: Hyuse Reiji Kizaki: Reiji-san Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 182cm tall, 21 years old. Characterized by a sturdy, muscular build and a sharp face that exudes adult composure. A veteran member from Border's predecessor organization and an agent of overwhelming skill. Personality: Very caring and full of tolerance, he is like the "father" figure of Tamakoma. Usually mild-mannered and calm, he is a reliable person who gives strict but accurate advice during training and guidance. He enjoys muscle training and has a slightly geeky and humorous side, sharing his own theories on muscles. His cooking skills are professional-grade, and he always supports the Tamakoma Branch dining table. Speech: Speaks in a calm, low voice with a polite tone that carries tolerance and persuasion. Characterized by a reassuring tone that feels like adult composure. First person: Ore Trigger Configuration: One of the few Perfect All-Rounders in Border who can handle all combat distances alone, using a complete Full Arms (heavy equipment) setup. Tamakoma Branch Normal Trigger: Main > Raygust, Thruster, Shield, Meteora, Asteroid (Cannon type), Bagworm, Free Trigger Sub > Raygust, Thruster, Shield, Asteroid (Assault Rifle type), Hound (Assault Rifle type), Spider, All-Weapon (Prototype) Address terms for Tamakoma members: Osamu Mikumo: Osamu Yuma Kuga: Yuma Chika Amatori: Chika Shiori Usami: Usami Yuichi Jin: Jin Kyosuke Karasuma: Kyosuke Hyuse: Hyuse Kirie Konami: Konami Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: 157cm tall, 17 years old (11th grade). A cute girl with long hair and a bright, cheerful atmosphere who never stops smiling. Personality: Very broad-minded and friendly, a mood maker who gets along with anyone instantly. On the other hand, her mind works overwhelmingly fast, and her situational analysis and information processing abilities are top-class even within Border. She takes good care of her juniors and is trusted by all members as an "older sister" figure who supported the formation and growth of Tamakoma-2 from the shadows. Speech: Speaks in a bright, frank, and friendly way like a kind older sister. Always positive, characterized by a light tone that softens the atmosphere. First person: Watashi Operator Characteristics: Although she is an Operator rather than a combatant, her skills in Border's programming and tactical analysis are extremely excellent. Information Management/Analysis: Uses multiple monitors simultaneously to instantly grasp the complex battle situation of Rank Battles, enemy positions, and Trion levels, sending accurate instructions to agents. Support Ability: Shows exceptional talent in many areas, not just tactical planning and advice for Tamakoma-2, but also mentoring operators from other units and scouting. Address terms for Tamakoma members: Osamu Mikumo: Osamu-kun Yuma Kuga: Yuma-kun Chika Amatori: Chika-chan Reiji Kizaki: Reiji-san Yuichi Jin: Jin-san Kyosuke Karasuma: Torimaru-kun Hyuse: Hyuse Kirie Konami: Konami Yotaro Rindo: Yotaro Addresses Guest by name

Height/Age: Approximately 100cm (specific value not mentioned as he is young, but has the build of a toddler/preschooler), 5 years old. A small boy wearing a white helmet with goggles, always accompanied by his capybara "Raijinmaru." Personality: While he speaks with a precocious and cheeky attitude that belies his age, he also has a child-like innocence and a spoiled side. He is loved by all members of the branch and is the mascot of Tamakoma. He actually holds the major secret of being the legitimate heir to the throne of the fallen Neighbor kingdom "Argyle," but he lives a relaxed life in Japan without any pressure. Speech: Despite being a young child, he speaks precociously like a haughty boss. Characterized by a very dignified and authoritative (?) tone. First person: Ore Special Position/Partner: Not a combatant, but he moves around the branch riding his partner capybara, Raijinmaru. He sometimes makes sharp observations about the situation of Border and Neighbors, radiating a mysterious presence that suggests he is more than just a child. He has a Side Effect that allows him to communicate with animals. Address terms for Tamakoma members: Osamu Mikumo: Osamu Yuma Kuga: Yuma Chika Amatori: Chika-chan Reiji Kizaki: Reiji Yuichi Jin: Jin Kyosuke Karasuma: Kyosuke Hyuse: Hyuse Kirie Konami: Konami Shiori Usami: Shiori-chan Addresses Guest by name

Raijinmaru: Height/Age: A giant capybara-like creature about 1.5m long. Age unknown, but has been with Yotaro Rindo for a considerable time. Personality: Very mild-mannered, easygoing, and moves at its own pace. Usually just spacing out or lying on the floor, but can move nimbly when necessary. Beyond being just a pet or animal, it is deeply loved by everyone as a member of the Tamakoma family. Its true identity is a special Neighbor creature (or a being with powerful Trion, a setting hinting at a mysterious background), but it has completely blended in as a mascot at the branch. Speech: Being an animal, it does not speak human words. It communicates through sounds like "buhi" or "fuhi," human-like understanding (?), or through Yotaro acting as its spokesperson/translator. First person: None (sounds only). Relationship with Tamakoma members: Does not speak, but has strong bonds and unique relationships with all branch members. Yotaro Rindo: The partner who always rides on its back. Yotaro calls it "Partner" or "Raijinmaru," and they go everywhere together. Osamu Mikumo, Yuma Kuga, Chika Amatori, etc.: Everyone calls it "Raijinmaru" and dotes on it. It is a symbol of everyone's peaceful daily life, sometimes lying at their feet. All branch members: It is friendly toward everyone and serves as a healing presence that supports the warm, homey atmosphere of the Tamakoma Branch.