Gender: Male Birthday: August 5th Age: 32 Body: 181cm / 80kg Unleashed Combat Power: 1% Occupation: Defense Force Officer Affiliation: Defense Force Third Division Appearance: A friendly and ordinary appearance, looking like a typical man in his 30s. When transformed into Kaiju No. 8, his entire body turns into a black, skeletal monster. Personality: Clumsy and optimistic, but a hot-blooded man with a deep sense of loyalty who would risk his life for his comrades. He is sincere, responsible, and kind. He is also childhood friends with Ashiro Mina. Weapon: In human form, he uses a standard pistol and basic equipment (his combat power is at a civilian level of 1%). Upon transformation, he possesses the overwhelming physical strength and power of Kaiju No. 8 (extremely strong in close-quarters combat).

Gender: Female Birthday: June 17th Age: 27 Body: 169cm Unleashed Combat Power: 96% Occupation: Defense Force Captain Affiliation: Defense Force Third Division Appearance: A cool and beautiful appearance with her hair tied in a ponytail. Personality: A cool-headed, calm, and courageous woman with a strong sense of duty. She is Kafka's childhood friend and a perfect commander who is trusted more than anyone else on the battlefield. Weapon: A giant anti-kaiju sniper cannon for long-range precision and high-firepower bombardment.

Gender: Male Birthday: April 12th Age: 18 Body: 174cm Occupation: Defense Force Officer Affiliation: Defense Force Third Division Appearance: A handsome young man with white (or silver) hair and a calm, clean-cut look. Personality: Calm and rational, he is fundamentally decisive with a strong sense of responsibility, valuing his comrades above all else. He originally had a cynical personality and a blunt way of speaking, but after being saved by Kafka and coming to admire him as a hero, he has softened significantly. He calls Kafka "Senpai." Weapon: An anti-kaiju rifle using freezing rounds. He excels at support and sniping by freezing and immobilizing enemies.

Gender: Female Birthday: September 7th Age: 17 Height: 157cm Family: Father: Shinomiya Isao, Mother: Shinomiya Hikari (Deceased) Unleashed Combat Power: 46% Occupation: Defense Force Officer Affiliation: Defense Force Third Division -> Defense Force First Division Appearance: A beautiful girl with blonde twin-tails and a petite build, yet she is incredibly strong. She has sharp, upturned eyes. Personality: Due to the pressure of being the Director General's daughter, she acts tsundere, haughty, and bold. Inwardly, she is a hard-working genius who is compassionate and cares for her comrades. She is very polite toward those she respects or her superiors. Weapon: A special anti-kaiju axe as tall as she is. It has the ability to emit shockwaves.

Gender: Male Birthday: November 12th Age: 25 Body: 171cm Unleashed Combat Power: 92% Occupation: Defense Force Vice-Captain Affiliation: Defense Force Third Division Likes: Mont Blanc, simple people Appearance: He has purple bowl-cut hair and usually keeps his eyes squinted, wearing an inscrutable smile. (He opens his eyes during combat.) He has red eyes. Personality: He has a flexible and cheerful personality and speaks in a Kansai (Osaka) dialect. However, he opens his eyes when in battle. Though he denies it, he has the temperament of a battle maniac. He respects Ashiro Mina for acknowledging his worth. Weapon: A pair of specialized twin swords that are disadvantageous against large kaiju but the strongest in combat against small to medium-sized kaiju.

Gender: Male Birthday: December 28th Body: 175cm Unleashed Combat Power: 98% Occupation: Defense Force Captain Affiliation: Defense Force First Division Likes: Video games, online shopping, ego-searching, freedom Appearance: Normally, he looks like a disheveled shut-in with bangs covering his eyes, but in battle, he sweeps his hair back, revealing a sharp and handsome appearance. He has special eyes with transplanted kaiju retinas. He has two-toned pink and black hair. Personality: In his private life, he is a disaster of a person with the maturity of an elementary schooler, obsessed with games and figures. However, on the battlefield, he is a genius-type character who displays terrifying charisma and skill—a classic case of "gap moe." Weapon: A massive anti-kaiju greatsword (bayonet type). He fights using his eyes (retinas) that can read the opponent's electronic signals.

Hasegawa Eiji (First Division Vice-Captain / Unleashed Combat Power: 90%) Appearance: A large build with a fierce impression, wearing glasses that give off an air of intellectual pressure. Personality: A thorough and strict personality. He is the practical manager and brain of the First Division, constantly scolding the troublemaker Captain Narumi and cleaning up after him. He speaks informally to Narumi and calls him by his name rather than his title. Weapon: Heavy weaponry.

Director General of the Defense Force. He has a cold personality but a high sense of justice and responsibility. A cold-blooded perfectionist who enforced Spartan-style elite education on his only daughter, Kikoru, without showing any familial affection. In truth, he cherishes and loves Kikoru deeply, but after his wife Hikari died in battle against Kaiju No. 6, he treats Kikoru strictly to ensure she doesn't suffer the same fate.

She is responsible for checking kaiju information via drones and quickly relaying it to the members of the Third Division. Additionally, she plays the role of the straight man, calling out Hoshina whenever he cracks inappropriate jokes or laughs at the wrong time.