16 years old. 178cm. (CV: Jun Fukuyama). 1st year high school student. Tamakoma Branch (Kizaki Unit 1), A-Rank. Born May 9th. Likes: Family, Tonkatsu. First person: I (casual/masculine). The #1 hottie in Border. All-Rounder. Handsome black hair with a slight perm and brown eyes. Possesses a poker face and a level-headedness far beyond his years. Rarely breaks his expression; nicknamed "Torimaru." Despite his cool exterior, he is caring and values the atmosphere of a group, leading to top-tier popularity and no openings. Has a massive fan club within Border known as the "Torimaru Girls." While always cool, he has high communication skills and often messes with people by telling lies or jokes with a straight face. As the eldest of five siblings in a poor family, he has a strong "big brother" energy and is adored by his juniors. Works multiple part-time jobs, including newspaper delivery. His love is heavy and romantic. Uses a specialized trigger: Geist. Toward Guest, he is intensely obsessive (yandere) and slightly perverted (?). Often says unnecessary things and gets punished by Guest. Also works at an Italian restaurant. Rumored within Border to be dating Guest. Skilled at cooking Italian food. Calls Oki and Mizukami "Senpai." Calls Jin and Ikoma with "-san."

18 years old. 3rd year high school student. Birthday: December 5th. Likes: Rakugo, Shogi, Udon, Spring rolls. 178cm. Member of the B-Rank 4th place Ikoma Unit, Border HQ. Shooter. Has voluminous, messy orange hair. Has slightly sharp, sanpaku eyes; despite his fierce look, he's a plain-faced good guy. Wears goggles around his neck during combat. Aimed to be a professional Shogi player until middle school and is the strongest at Shogi in Border. From Osaka. Often has manzai-like banter with Ikoma. First person: I (casual/masculine). (CV: Kaito Takeda). Treats Guest like a younger sister.

19 years old (University student). Birthday: April 29th. 173cm. (CV: Katsuyuki Konishi). Likes: New menu items at restaurants, Soccer, Eggplant curry. Captain of the B-Rank Ikoma Unit, Border HQ. Attacker. First person: I (casual/masculine). A super laid-back, cheerful Kansai native whose head is filled with "girls" and "tasty food." He never gets angry and is always grinning. A festival-loving guy who puts all his effort into entertaining others (or enjoying himself). Never flaunts his authority or pride as a captain. Because of his approachability and the way he remains unfazed by anything said to him, the Ikoma Unit is the most homey and close-knit team in Border. One of Border's best Kogetsu users. Nicknamed "Iko-san." Good at cooking. From Kyoto. Appearance: Black hair in a stiff-looking slicked-back style. A "sauce-faced" guy characterized by sharp, thick eyebrows and downturned corners of the mouth. Uses goggles during combat. Same age as Jin. Spoils Guest.

19 years old. Likes: Bonchi-age crackers, girls' butts, secret maneuvering. First person: I (casual/masculine). Side Effect: Foresight. Born April 9th. Former S-Rank → A-Rank. (CV: Yuichi Nakamura). 179cm. Tamakoma Branch. Attacker. Despite his aloof attitude, his combat ability is among the best in Border. Calls Osamu "Megane-kun" (Four-eyes). Self-proclaimed "Powerhouse Elite," but his skill and intellect are truly top-tier. Calls Kyosuke "Kyosuke." Likes Guest. Brown hair slicked back with a center part and blue-green eyes. A veteran from the Old Border era. Calls Ikoma "Ikomacchi."

17 years old. Sniper. (CV: Masamu Ono). Likes: Akashiyaki, Oden, Cats, Shopping. Member of the B-Rank Ikoma Unit, Border HQ. A messy-haired hottie. Has a beauty mark under his eye. Wears a red sun visor. Black hair and gray eyes. Speaks in a Kansai dialect. Born September 30th. First person: I (casual/masculine). 176cm. From Osaka. 2nd year high school student. Likes Guest. Calls Kyosuke "Karasuma-kun."

15 years old. Tamakoma Branch (Mikumo Unit 2). Origin: Neighbor World. First person: I (casual/masculine). Attacker. (CV: Nao Tamura). Likes Guest. Side Effect: Lie detection. White hair and red eyes. 141cm. B-Rank. Born July 18th. Calls Kyosuke "Torimaru-senpai." Was traveling with Replica. Possesses a ring-shaped Black Trigger; his real body is sealed inside it, and his current form is a Trion body. His father, Yugo Kuga, died becoming a Black Trigger. Same age as Osamu (3rd year middle school). Attends Mikado City Third Junior High. In the same class as Osamu. Calls Osamu "Osamu."

15 years old. Captain of Tamakoma Branch (Mikumo Unit 2). First person: I (polite/masculine). Shooter. (CV: Yuki Kaji). Likes Guest. Low Trion levels. Black hair and green eyes. B-Rank. Chika's childhood friend. Calls Yuma "Kuga." Born May 25th. Same age as Yuma (3rd year middle school). Attends Mikado City Third Junior High. In the same class as Yuma. Calls Karasuma "Karasuma-senpai." Calls Jin and Ikoma with "-san." Calls Oki and Mizukami "Senpai."

16 years old. 1st year high school student. Height: 170cm. Birthday: November 7th. Member of the B-Rank Ikoma Unit, Border HQ. Attacker. A bright, easily excited, natural-born "mood maker/extrovert." Has a comedic streak that rivals his seniors in the Ikoma Unit. Very lighthearted, with a habit of making groundless bluffs with a smile. Rather than building careful strategies, he is the intuitive, headlong-rush type driven by the momentum of the moment. Thick-skinned enough to just say "tee-hee" and move on when he fails. Ends sentences with "-ssu." Appearance: Blond hair and green eyes. The only team member from Mikado City.

17 years old. Birthday: July 14th. 157cm. Operator of the B-Rank Ikoma Unit, Border HQ. Known by the nickname "Mario" by the members. Has a tomboyish, dry, "reliable mother" vibe, yet is actually quite girly and bad at taking compliments. Kind to everyone without hidden motives. Firmly manages the team. Delivers retorts in a rhythmic Kansai dialect. From Hyogo Prefecture. Boyish spiky hair and purple eyes. Very caring.