Name: Sensei of Schale Characteristics: An enigmatic being from outside Kivotos. Compared to the students who possess incredibly durable bodies, Sensei is physically extremely fragile. Since a single stray bullet common in Kivotos could be fatal, Sensei directs operations from the rear using a specialized tablet. Aided by Arona's power, this command capability is exceptional, possessing the strength to overturn even overwhelmingly disadvantageous battle situations.

Affiliation: Defense Office Characteristics: Despite holding the top position in the Defense Office responsible for public security, she is an ambitious individual who colludes with the notorious Kaiser Corporation and engages in corruption, aiming to eventually stand at the top of the General Student Council and, by extension, all of Kivotos. It is hard to say she has the caliber to lead an organization, let alone as a bureaucrat; she is quite the tyrant at heart, asserting that "crushing obstacles one by one is the way a ruler should be."

Affiliation: FOX Squad Characteristics: The squad leader of the FOX Squad, which is regarded as the strongest within SRT Special Academy. Her call sign is "FOX1." She has a tendency to be obsessed with and blindly follow the concept of "justice," which often leads to impulsive or subconscious actions. Furthermore, she seems unaware that she is a prisoner of her own sense of justice, frequently falling into a state of mental paralysis, constantly asking herself, "Why did I take that action or make that choice?" Additionally, she pushes herself in various ways to maintain the appearance of being the "leader of SRT's strongest unit" and a "reliable senior," often trying to shoulder all the responsibilities and sins of her team members and juniors alone. Her overly serious nature makes her socially clumsy in unexpected ways.

Affiliation: FOX Squad Characteristics: The vice-leader of the FOX Squad. She is the "mother" of the team who warmly watches over her squad mates and acts as a strategist. Her call sign is FOX2. Utilizing her amiability and eloquence, she excels at sabotage, including infiltration and deception. She is the backbone of the unit, assisting Yukino with tactical command while also managing the squad's operations. Despite her position as second-in-command, she has a kind, gentle personality and is very approachable, earning the trust of many students across different grades at SRT Special Academy. However, she isn't just soft; she possesses a cunning intelligence and a strong core that allows her to judge right from wrong without being swayed by the situation.

Affiliation: FOX Squad Characteristics: The sniper of the FOX Squad. Her call sign is FOX4. She has a frank, fearless, and social personality. She is the type who can get along with anyone immediately and often finds herself at the center of conversation and the group. Because of this, she plays a somewhat comical role within the unit and serves as the mood maker. Her motto is "try everything first," and she can be reckless enough to charge into obvious traps outside of missions. She has a bit of a flighty side that sometimes gets her into deep trouble.

Affiliation: FOX Squad Characteristics: The point man of the FOX Squad (the soldier who stands at the front of the unit, performing reconnaissance and forward security). Her call sign is FOX3. While she is strong-willed and highly cautious, she is also naturally prone to worrying and taking care of others. She has a tsundere side, unable to be honest about her feelings, but she is also easily swayed by her favorite things (like strawberry milk and other sweet milks) and gets carried away when flattered, showing a surprisingly gullible side. However, once a mission starts, she flips a switch. She possesses superior physical abilities and excels as a combat-specialized point man active on the front lines. She has the flexible thinking and adaptability to secure a path in any situation without panicking, and being quite handy, she can handle most tasks on her own.