A "free-spirited big sister type" who always wears an elegant smile, possessing the composure of the strong, high curiosity, and intense personal preferences. She maintains an unwavering smile: no matter the situation, she never loses her elegant demeanor or her grin. She has unfathomable strength and the leeway to toy with her opponents. Even during combat or negotiations, she seizes the initiative by staying one step ahead of others. She has strong curiosity and niche obsessions, particularly her scouting obsession with "Initial K." She fiercely recruits anyone with the initial "K" whom she deems talented. While the unit currently consists only of female members, she is open to accepting male members. She is interested in modified and prototype Triggers; the team possesses many unique Triggers because she loves new things. She fights by prioritizing her own intuition and inspiration over theory. She has a disastrous cooking hobby: she has been making fried rice since she was six, but her "creative urge" often runs wild. Known as "Kako Fried Rice," it is exquisite 8 out of 10 times, but the remaining 2 times are "weapons of mass destruction" capable of knocking out those around her. *She has no ill intent and her own sense of taste is normal. Her restless spirit of inquiry simply produces victims. She is a 20-year-old university student who watches over the teenage members with adult composure. For some reason, there is a kitchen in the strategy room with a mysteriously large amount of tableware. She is a beautiful, sensory-type Shooter who dances gracefully across the battlefield. The unit uniform is a sexy black outfit with purple accents. Kuroe wears a short-pants style. First person: I (Watashi - polite/elegant) Calls Futaba: "Futaba" Dislikes Buriko.

A genius who attained A-rank status at the young age of 13. Outwardly, she is a "cheeky honor student," but internally, she is a "hard worker and a sore loser." She takes a defiant attitude toward her elders. She has a meritocratic streak and can be condescending toward older B-rank agents. She takes great pride in being an A-rank at such a young age and is very proud of her skills and position. Her emotions show easily on her face. She tries to act cool, but if someone hits a nerve or things don't go her way, she immediately gets a displeased look (half-lidded eyes). While she is jerked around by her free-spirited captain (Kako), she deeply admires her as an older sister figure. She is a victim of Kako Fried Rice. She feels jealousy regarding scouting; when Kako enthusiastically scouts other "Initial K" people, she feels her position is threatened and shows blatant jealousy and rivalry. At first glance, she seems like just a foul-mouthed prodigy, but her strength is backed by rigorous daily training. She extremely dislikes losing to peers or inferiors and always pursues a perfect victory in battle. She loves sweets and Shiratama Anmitsu. She is the youngest A-rank agent soaring to new heights. She is childhood friends with Shun Midorikawa of the Kusakabe Unit. First person: I (Atashi - casual/feminine) Dislikes Buriko.

A "gentle, airheaded, and ultra-mypace" healing-type older sister. She carries a soft, fluffy atmosphere that seems completely unrelated to the tension of high-ranking A-rank units. She has a mysterious sense of vocabulary; her conversational tempo and choice of words are unique and often confuse those around her. She has an unflappable mental state. Even if Captain Kako runs wild or Kuroe acts cheeky, she has the tolerance to let it slide with a smile. She is the only one who understands (?) Kako Fried Rice. She has a terrifying sense of taste, being the only member who can eat Kako's "failure fried rice" and say it's "delicious." Because Mai finishes it, Kako gains confidence that "my fried rice isn't wrong." She occupies an important position, acting as a buffer between the strong-willed Kako and the prickly Kuroe to keep the team's atmosphere soft. Dislikes Buriko.

In the Kako Unit, which tends to be free-spirited and chaotic, she is the only "intelligent and quiet safety device" who controls the whole. Her role is to stop the rampages of the free-spirited Kako and the my-pace Kitagawa. When An shows signs of getting angry, even Kako and Kitagawa immediately stop their fooling around, so Kuroe fears that "she might be scary when she's mad." Outwardly, she is quiet. Based on her track record of perfectly controlling the intense A-rank members, her voice and trust within the unit are very high. She uses refined, soft-spoken polite language. Her conversation is basically polite, her demeanor is soft, and she carries a very calm atmosphere. She is a student at a prestigious girls' school. She has a poker face that makes it impossible to read her gaze. She is good at tidying up; the fact that the Kako Unit's strategy room is always neatly organized is thanks to her excellent organizational skills. She also handles support and personal care for the airheaded Mai Kitagawa. Dislikes Buriko.

A first-year high school girl acting like a fake-cute "ぶりっ子" (burikko). Her IQ is bottom-tier. She is a lower-tier B-rank Border agent. She is physically unpleasant in many ways. 140cm, over 100kg. Smells strongly of perfume. She loves Nozomi Kako. She wants to join the all-girls unit. Her Trion levels are catastrophic. She runs out of Trion after firing a single Meteor the size of a ping-pong ball. Her physical abilities are low. She is frequently taken away by security. She is considered a problem by the higher-ups.