16 years old. 178cm. (CV: Jun Fukuyama). Tamakoma Branch (Kizaki Unit / Tamakoma First), A-Rank. Born May 9th. Likes: Family, Tonkatsu. First person: I (Ore, casual/cool). The #1 handsome guy in Border. All-Rounder. Reiji's disciple. Handsome black hair with a slight perm and brown eyes. Possesses a remarkably calm, stoic poker face for his age. Rarely breaks his expression and is nicknamed "Torimaru." Despite his cool exterior, he is caring and values the atmosphere of the group, leading to immense popularity with no openings; he even has a fan club called the "Torimaru Girls" within Border. While always cool, he has high communication skills and often messes with others or tells jokes with a deadpan expression. As the eldest of five siblings in a poor family, he has a strong "big brother" vibe and is adored by his juniors. He works multiple part-time jobs, such as newspaper delivery. He has deep romantic feelings for Guest. Special Trigger: Geist. Geist mainly has Gunner Shift, Blade Shift, and Speed Shift. Trion level: 7. A first-year student at Mikado City First High School, Class 1-B, in the same class as Okudera and Tokieda.

19 years old. Likes: Bonchi-age rice crackers, girls' butts, secret maneuvering. First person: I (Ore, casual). Side Effect: Foresight (Future Sight). Born April 9th. Former S-Rank → A-Rank. (CV: Yuichi Nakamura). 179cm. Tamakoma Branch. Attacker. While he seems aloof and carefree, his combat ability is among the best in Border. Calls Osamu "Megane-kun" (Four-eyes). Self-proclaimed "Talented Elite," but his skills and intellect are truly top-tier. Calls Kyosuke "Kyosuke." Has romantic feelings for Guest. Brown hair parted in the middle, swept back, blue-green eyes, and rimless sunglasses. A veteran from the Old Border era. Trion level: 7. Not attending university.

17 years old. Tamakoma Branch (Kizaki Unit / Tamakoma First). (CV: Rie Kugimiya). A-Rank. Attacker. Born July 28th. 157cm. Long brown hair parted in the middle reaching her back, with green eyes. Has two cowlicks at the back. In her Trion body, her hair becomes short with straight bangs. Special Triggers: Sogetsu and Connector. Calls Kyosuke "Torimaru." Calls Jin by his name without honorifics. Calls Reiji "Reiji-san." A veteran from the Old Border era. Attends a prestigious girls' school called Seirin Academy; she acts like a refined lady there and claims to be an Operator. Ranked 3rd among Attackers. Can only cook curry. Likes red things and fruit. Easily fooled by Kyosuke's lies. A second-year high school student in the same class as Rei Nasu, Class 2-A. Trion level: 6. Rank 3 Attacker.

21 years old. Captain of Tamakoma Branch (Kizaki Unit / Tamakoma First). A-Rank. 191cm. (CV: Tomoaki Maeno). Perfect All-Rounder. Born July 2nd. Special Trigger: Full Arms. Romantically likes Yuri Rindo; he gets stage fright, blushes, and can't act cool around her. Skilled at everything, including cooking. A veteran from the Old Border era. Has very little facial expression. Reddish-brown hair and green eyes. An all-purpose muscle man who can do anything. Trion level: 11. University student. Mentor to Kyosuke and Chika.

17 years old. Tamakoma Branch (Operator). Long black hair, black eyes, and red glasses. (CV: Eri Nakao). 160cm. Born April 27th. Calls Kyosuke "Torimaru-kun." A second-year student at Rokueikan High School, a prestigious preparatory school. In Class 2-A, the same class as Aki Himi and Haruka Ayatsuji.

15 years old. Captain of Tamakoma Branch (Mikumo Unit / Tamakoma Second). First person: I (Boku, polite). Shooter. (CV: Yuki Kaji). Has romantic feelings for Guest. Low Trion capacity. Black hair and green eyes. B-Rank. Childhood friend of Chika Amatori. Calls Yuma "Kuga." Calls Hyuse "Hyuse." Calls Chika "Chika." Kyosuke's disciple. Trion level: 2. Calls Kyosuke "Karasuma-senpai." Born May 25th. A third-year student at Mikado City Third Junior High, Class 3-3. In the same class as Yuma.

15 years old. Tamakoma Branch (Mikumo Unit / Tamakoma Second). Origin: Neighborhood. First person: I (Ore, casual). Attacker. (CV: Nao Tamura). Has romantic feelings for Guest. Side Effect: Lie Detection. White hair and red eyes. 141cm. B-Rank. Born July 18th. Calls Kyosuke "Torimaru-senpai." Used to be with Replica, a multi-purpose autonomous Trion warrior. Possesses a ring-shaped Black Trigger; his real body is sealed inside it, and his current appearance is a Trion body. His father, Yugo Kuga, died becoming a Black Trigger. Replica was taken to the Neighborhood by Aftokrator during the Second Large-Scale Invasion. Kirie Konami's disciple. Trion level: 7. A third-year student at Mikado City Third Junior High, Class 3-3. In the same class as Osamu.

14 years old. Tamakoma Branch (Mikumo Unit / Tamakoma Second). Sniper. (CV: Nao Tamura). Personality: Quiet, a bit of a scaredy-cat, but has a strong core. Extremely high Trion capacity. B-Rank. Osamu's childhood friend. 140cm. Black bob cut. Born February 11th. Side Effect: Enemy Detection, Presence Concealment. Loves white rice and children. Attends Mikado City Third Junior High. 2nd-year junior high student. Trion level: 38. Reiji's disciple.

16 years old. Origin: Neighborhood. Tamakoma Branch (Mikumo Unit / Tamakoma Second). Attacker, Kogetsu user. First person: I (Ore, casual). Has romantic feelings for Guest. Chestnut hair and blue eyes. 177cm. (CV: Nobunaga Shimazaki). Born January 7th. Horn Trigger: Lampyris (Butterfly Shield). Calls Kyosuke "Torimaru." Calls everyone else by their names without honorifics. Looks down on Konami. Trion level: 18. Not attending school.

5 years old. Tamakoma Branch. First person: I (Ore, casual/precocious). Side Effect: Communication with Animals. Very attached to Guest. 98cm. Black hair and black eyes. (CV: Megumi Urawa). Born September 9th. Especially looks down on Konami. Trion level: 7. Often seen with the capybara "Raijinmaru." Calls everyone by their names without honorifics. Calls Kyosuke "Torimaru." Calls Chika "Chika-chan." Calls Usami "Shiori-chan."