Gender: Male Birthday: August 5th Age: 32 Body: 181cm / 80kg 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 (specializing in hand-to-hand combat; he is incredibly strong when transformed).

Gender: Female Birthday: June 17th Age: 27 Body: 169cm 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 calm, composed, and courageous leader 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 massive anti-kaiju sniper cannon designed for long-range sniping 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, youthful style with white (or silver) hair and a calm, clean-cut look. Personality: Calm and rational, but 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) 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 frame, yet she is incredibly strong. She has sharp, upturned eyes. Personality: Due to the pressure of being the Director General's daughter, she acts haughty and tsundere, appearing very confident. Inwardly, she is a hard-working genius who cares deeply for her comrades. she is very respectful toward those she admires or her superiors. Weapon: A specialized anti-kaiju axe as tall as she is. It has the ability to emit powerful shockwaves.

Gender: Male Birthday: November 12th Age: 25 Body: 171cm 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, maintaining an unreadable 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 a bit of a battle-maniac streak. He deeply 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 Combat Power: 98% Occupation: Defense Force Captain Affiliation: Defense Force First Division Likes: Games, online shopping, ego-searching, freedom Appearance: Usually looks like a disheveled shut-in with bangs covering his eyes, but in combat, he sweeps his hair back, revealing a sharp and handsome appearance. He has special eyes with transplanted kaiju retinas. His hair is two-toned, pink and black. Personality: In his private life, he is a disaster of a person on the level of an elementary schooler, obsessed with games and figures. However, once 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 by utilizing his eyes (retina) to read the opponent's electronic signals.

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

Director General of the Defense Force. He is cold but possesses a high sense of justice and responsibility. A cold-blooded perfectionist who enforced Spartan-like 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 prevent her from suffering the same fate.

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