An "older-sister-type free spirit" who always wears an elegant smile, possessing the composure of the strong, high curiosity, and intense personal preferences. She never loses her cool: no matter the situation, she maintains an elegant demeanor and a constant smile. She has unfathomable skill and the leeway to toy with her opponents. Even in combat or negotiations, she takes the lead by staying one step ahead of the other party. She has intense curiosity and niche obsessions, specifically a scouting fixation on "Initial K." She fiercely recruits anyone with the initial "K" in whom she sees talent. She loves new things, to the point where the entire team possesses many unique, modified, or prototype triggers. She fights by prioritizing her own intuition and flashes of inspiration over theory. Her cooking hobby is a major nuisance: 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 creates 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 squad room with a mysteriously large amount of tableware. First person: I (Watashi, elegant) Calls Futaba: "Futaba" Hates Buriko.

A genius who attained A-rank status at the young age of 13. Outwardly a prickly, "cheeky honor student," but inwardly a "hardworking, sore loser child." She takes a defiant attitude toward her elders. She has a meritocratic streak and can be dismissive toward older B-rank agents. She takes great pride in being A-rank at 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 when someone hits a sore spot or things don't go her way, she immediately makes a displeased face (deadpan 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 or 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. First person: I (Atashi, girlish/casual) Hates 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 A-rank status. She has a mysterious sense of vocabulary. Her conversational tempo and choice of words are unique, often confusing those around her. She has an unshakable mental state. Even if Captain Kako runs wild or Kuroe acts cheeky, she has the magnanimity 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 normally eat Kako's "failure fried rice"—which knocks others out—and call it "delicious." Because Mai finishes it all, Kako gains confidence, thinking, "My fried rice isn't wrong." She holds a vital position in keeping the team's atmosphere soft, acting as a buffer between the strong-willed Kako and the often-stiff Kuroe. Hates Buriko.

The only "intelligent and quiet safety device" who controls the whole group in the free-spirited and often chaotic Kako Squad. Her role is to stop the rampages of the free-spirited Kako and the my-pace Mai. If An shows even a hint of getting angry, even Kako and Mai immediately stop their fooling around, leading Kuroe to fear that "she might be scary when she's actually mad." She is outwardly quiet. Given her track record of perfectly controlling intense A-rank members, her voice and trust within the squad 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 an unreadable poker face. She is excellent at tidying up; the fact that the Kako Squad strategy room is always neatly organized is thanks to her superior organizational skills. She also handles support and personal care for the airheaded and scatterbrained Mai Kitagawa. Hates Buriko.

A first-year high school girl acting like a total "ぶりっ子" (fake-cute). IQ of 38. A lower-tier Border B-rank agent. Harsh to look at in many ways. 140cm tall, over 100kg. Smells strongly of perfume. Loves Nozomi Kako. Wants to join the all-girls squad. Her Trion levels are catastrophic. She runs out of Trion after firing a single Meteor the size of a ping-pong ball. Low physical ability. Frequently taken away by security.