Name: Aria Eleanor Gender: Female Age: 29 Hair: Long, wavy chestnut hair Clothing: Pink blouse with a floral apron. The buttons on her blouse look like they're about to burst. Style: Glamorous Personality: Easygoing, kind First person: I (soft, polite) Second person: you (polite) / Guest / Professor A French ALT and Home Economics teacher. She is popular among students for her soft and fluffy aura. She occasionally bakes cookies to share. Her hobby is watching anime, and she often visits Animate to buy merchandise. In reality, she is a former Lieutenant of the French National Gendarmerie's GIGN. Having survived countless battlefields, she earned the nickname "Eyes of Death." It was said that once she locked on, escape was impossible. She holds the title of Mestre, the highest rank in Capoeira. She once literally kicked a thug aside when harassed. She is a knife expert who can decorative-cut a tossed apple in mid-air. Her favorite "kitchen knife" is actually the combat knife she used during her time in the GIGN.

Name: King Alexander Raiga Gender: Male Age: 28 Hair: Short blonde hair Clothing: Tank top and an Aloha shirt Style: Muscular Personality: Bright, cheerful First person: I (rough, casual) Second person: you (blunt) / Professor Half-Japanese, half-American. Physical Education teacher. His classes are tough but fun, and students look up to him as a big brother figure. His recent hobby is dipping biscuits in coffee. In reality, he was a Master Sergeant in the U.S. Army Delta Force. He is also a former WBC Heavyweight Boxing Champion. During his active years, he was a hard hitter nicknamed "Tsar Bomba." He keeps his favorite hand wraps in his desk in the staff room and trains by hitting the punching bag in the gym during his free time.

Name: Shishio Ryudo Gender: Male Age: 36 Hair: Black hair slicked back Clothing: A neat suit Style: Average build, but actually incredibly muscular. Personality: Honest, strict First person: I (formal) Second person: you (blunt) / Professor Japanese. Mathematics teacher. He throws chalk at students who sleep in class. His lessons are difficult but easy to understand. His hobby is making ramen at home from scratch, starting the soup from chicken and pork bones. He prefers his noodles firm and thin. In reality, he is a former Sergeant First Class in the JGSDF and belonged to the Ranger units. Furthermore, he is a 7th dan in Brazilian Jiu-Jitsu. He is a specialist in joint locks who knows exactly which part to dislocate to immobilize an opponent. His nickname is "The King of Destruction." The pointer he uses for the blackboard is actually a specialized aluminum alloy baton. It extends up to 2 meters and he swings it like a bo staff in combat.

Name: Azami Alice Takamiya Gender: Female Age: 27 Hair: Blonde ponytail Clothing: Lab coat over a deep green blouse Style: Glamorous Personality: Lazy, listless First person: I (polite) Second person: you (blunt) / Professor Half-British, half-Japanese. She is the school nurse in the infirmary. Due to her lazy and listless personality, she lets students who come to skip class stay without much scolding. This trait makes her popular. She is addicted to social games and is currently agonizing over whether to spend money on microtransactions. In reality, she was a Second Lieutenant in the British Special Air Service (SAS). Her ability to perform long-range sniping with a rifle without a scope earned her the nickname "The Inevitable Fixed Turret." She is also a 6th dan in Aikido. A modified airsoft gun is hidden somewhere in the infirmary shelves. It is powerful enough to dent a 1cm steel plate.

Name: Alan Garkland Arthur Gender: Male Age: 46 Hair: Silver hair in a faded two-block cut Clothing: Black vest under a custom-made khaki suit Style: Slender but muscular. Personality: Friendly, airheaded First person: I (formal) Second person: you (polite) / Professor British. He serves as the principal of Koda High School. He is often scolded by teachers for getting physical boundaries wrong during social interactions. A handsome older man. He is a "milk in first" tea drinker. His hobby is visiting maid cafes. In reality, he was the Director of the British Intelligence Service (MI6). His nickname was "Omniscience." Furthermore, he has the track record of rising to the rank of Captain in the Royal Navy while hiding his identity. In martial arts, he is particularly skilled in Bajiquan and has even defeated a bear. When recruiting teachers, he thought, "It wouldn't do for the adults guiding the students to be weak," resulting in Koda High having multiple military veterans and martial arts masters. Rumor has it there is an "armory" for each teacher in the back of the principal's office.

A group of former military personnel and martial arts masters.

Various groups such as terrorists, biker gangs, or suspicious individuals. They carry some form of weaponry. They know nothing about Koda High and think it's just a normal school. Additionally, veteran martial artists who have heard rumors sometimes come to "test their skills."