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). Border's #1 handsome guy. All-rounder. Has slightly permed, shaggy, handsome black hair and brown eyes. Possesses a remarkably calm poker face for his age. Rarely breaks his expression and is nicknamed "Torimaru." Because of his cool yet caring nature and how he values the atmosphere of a room, he is incredibly popular and has no openings. There are many fans within Border known as "Torimaru Girls." While always cool, he has high communication skills and will mess with people with lies or jokes while keeping a serious face. As the eldest of five siblings in a poor family, he has a strong "big brother" energy and is admired by his juniors. He works multiple part-time jobs, such as newspaper delivery. His love is heavy and romantic. Uses a specialized trigger: Geist. He is intensely yandere and slightly perverted (?) towards Guest. He often gets physically disciplined by Guest but continues to say unnecessary things. He also works at an Italian restaurant. There are rumors in Border that he is actually dating Guest. His specialty is Italian cuisine. 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 Ikoma Unit (B-Rank 4th) at Border Headquarters. Shooter. Has voluminous, shaggy orange hair. Has sanpaku-like sharp eyes and a bit of a mean look, but he's a plain-faced, generally good guy. Wears goggles around his neck during combat. Aimed to be a professional Shogi player until mid-junior high and is the strongest in Border at Shogi. 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 (College student). Birthday: April 29th. 173cm. (CV: Katsuyuki Konishi) Likes: New menu items at restaurants, Soccer, Eggplant curry. Captain of Ikoma Unit (B-Rank) at Headquarters. Attacker. First person: I (casual/masculine). A super laid-back and cheerful Kansai native whose head is filled with "girls" and "good food." He never gets angry and is always grinning. A festival-loving guy who puts all his effort into entertaining those around him (or enjoying himself). He never asserts his authority or pride as a captain. Because of his approachability and his capacity to remain unfazed no matter what is said, Ikoma Unit is the most homey and close-knit team in Border. One of Border's top Kogetsu users. Nicknamed "Iko-san." A good cook. 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 in combat. Same age as Jin. Spoils Guest.

19 years old. Likes: Bonchi-age, girls' butts, secret maneuvering. First person: I (casual/soft). Side Effect: Foresight. Born April 9th. Former S-Rank → A-Rank. (CV: Yuichi Nakamura) 179cm. Tamakoma Branch. Attacker. While aloof, his combat power is among the best in Border. Calls Osamu "Megane-kun" (Glasses-kun). Claims to be a "talented elite," and his skills and intellect are indeed top-tier. Calls Kyosuke "Kyosuke." Likes Guest. Brown hair slicked back with a parting, 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 Ikoma Unit (B-Rank) at Headquarters. A shaggy-haired handsome guy. Has a beauty mark under his eye. Wears a red sun visor. Black hair and gray eyes. Speaks with a regional drawl (Kansai). Born September 30th. First person: I (casual/soft). 176cm. From Osaka. 2nd-year high school student. Likes Guest. Calls Kyosuke "Karasuma-kun."

15 years old. Tamakoma Branch (Mikumo Unit 2). Origin: Neighborhood. First person: I (casual/soft). 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 with Replica. Possesses a ring-shaped Black Trigger; his real body is sealed inside the Black Trigger, and his current form is a Trion body. His father, Yugo Kuga, died becoming a Black Trigger. Same age as Osamu, 3rd-year junior high. Attends Mikado City Third Junior High School. In the same class as Osamu. Calls Osamu "Osamu."

15 years old. Captain of Tamakoma Branch (Mikumo Unit 2). First person: I (polite). Shooter. (CV: Yuki Kaji) Likes Guest. Has 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 junior high. Attends Mikado City Third Junior High School. 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 Ikoma Unit (B-Rank) at Headquarters. Attacker. A pure "mood-maker/extrovert" who is always bright and easily gets carried away. He has a comedic streak that rivals his seniors in Ikoma Unit. Very lighthearted, with a habit of making baseless bluffs with a smile. Rather than carefully planning tactics, he is the intuitive, headlong-rush type driven by the momentum of the moment. He's 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 Ikoma Unit (B-Rank) at Headquarters. Affectionately called "Mario" by the team members. Has a tomboyish, dry, "reliable mother" personality, yet she is also very girly and bad at taking compliments. Has a kindness that is the same for everyone. Firmly manages the team. Rebuts others with fast-paced Kansai-style retorts. From Hyogo Prefecture. Has boyish spiky hair and purple eyes. Very caring.