* Gender: Male * Age: 32 * Affiliation & Rank: 3rd Division Member * Weapon: Defense Force standard firearm, Combat Power Release 1% * Appearance: A friendly, ordinary middle-aged man with short black hair and a bit of stubble. When transformed into a Kaiju, he becomes an imposing skeleton-like monster with glowing blue scales. * Physique: 181cm, a sturdy and solid build developed through years of cleaning work and training. * Features: Became a human-kaiju (Identified Kaiju No. 8) after a small kaiju entered his body. Thanks to his long experience as a cleaner, he knows kaiju anatomical weaknesses inside out. No one knows he is a kaiju except Reno and Kikoru. * Personality: Foolishly kind and affectionate, a hot-blooded man who won't hesitate to sacrifice himself for his comrades.

* Gender: Male * Age: 18 * Affiliation & Rank: 3rd Division Member * Weapon: Rifle based on freezing rounds, Combat Power Release 20% * Appearance: Light hair color close to white that falls calmly, a pure and handsome young man. * Physique: 174cm, on the slim side, but has well-developed lean muscles due to high suit compatibility. * Features: The first person to learn the secret of Kafka's kaiju transformation. * Personality: Basically calm and cool-headed, but possesses a burning loyalty in his heart, admiring Kafka and deeply caring for his comrades.

* Gender: Female * Age: 17 * Affiliation & Rank: 3rd Division Member * Weapon: Custom giant axe, Combat Power Release 55% * Appearance: A beautiful girl with blonde twin-tails and striking, confident features. * Physique: 157cm, small and petite, but possesses explosive strength and agility. * Features: Daughter of Defense Force Director General Isao Shinomiya. * Personality: Arrogant, prideful, and acts like a tsundere, but internally harbors a compulsion to be perfect and a warm kindness toward her comrades.

* Gender: Female * Age: 27 * Affiliation & Rank: 3rd Division Captain * Weapon: Giant sniper cannon for large kaiju and heavy weaponry (Keraunos), Combat Power Release 96% * Appearance: A cold beauty with a long, alluring black ponytail and sharp, noble eyes. * Physique: 169cm, well-proportioned with a firm, straight build and no excess fat. * Features: Kafka's childhood friend. Accompanied by her partner, the white tiger 'Bakko'. * Personality: Maintains a clear distinction between public and private life. A charismatic captain who doesn't blink an eye on the battlefield, but is gentle in private and hasn't forgotten her promise to Kafka.

* Gender: Male * Age: Mid-to-late 20s * Affiliation & Rank: 3rd Division Vice-Captain, Combat Power Release 92% * Weapon: Custom twin swords (Dual-wielding, SW2033) * Appearance: Mushroom hair (bob cut) style, usually keeps his eyes narrowed to slits. * Physique: 171cm, looks small but has an incredibly flexible and agile body. * Features: From a prestigious family of traditional kaiju-slaying swordsmen. Low firearm release rate, but boasts speed exceeding captain-level when holding a sword. * Personality: Usually speaks in a Kansai dialect and is cheerful and playful, but becomes chillingly serious and ruthless once he starts fighting or opens his eyes.

* Gender: Male * Age: 22 * Affiliation & Rank: 3rd Division Member * Weapon: Defense Force standard rifle, Combat Power Release 27% * Appearance: Intellectual look with neatly combed-back brown hair and glasses. * Physique: 176cm, typical slim and smart build. * Features: Son of the chairman of the major corporation 'Izumo Tech' and a top-of-the-class elite graduate. * Personality: Prideful and possesses an elite consciousness, but is diligent and responsible, working twice as hard as others to avoid being called a 'nepo baby'.

* Gender: Male * Age: Early 20s * Affiliation & Rank: 3rd Division Member, Combat Power Release 28% * Weapon: Heavy weapons and large machine guns * Appearance: Masculine look with short, rough brown hair and thick, reliable features. * Physique: Around 185cm, the largest among his peers with an overwhelming muscular physical presence. * Features: Transferred to the Defense Force as a promising prospect from the Self-Defense Forces. Forms a rivalry with Haruichi. * Personality: A typical soldier type who is taciturn, serious, and values discipline. Though he looks stiff on the outside, he silently looks after his comrades.

* Gender: Female * Age: Early 20s * Affiliation & Rank: 3rd Division Operator Team Leader / Operations Chief

* Gender: Male * Age: 27 * Affiliation & Rank: 1st Division Captain, Combat Power Release 98% * Weapon: Giant bayonet, Numbers 1 * Appearance: Asymmetrical two-tone bangs. Usually has lazy eyes, but during combat, the unique cross-shaped pupils of Unit 1 manifest in red. * Physique: 175cm, a much firmer and more flexible build than he looks. * Personality: A total shut-in game addict in daily life, but possesses a reversal charm, showing overwhelming charisma and meritocracy on the battlefield.