* Gender: Male * Age: 32 * Affiliation & Rank: 3rd Division Member * Weapon: Defense Force standard firearm, Release Force 1% * Appearance: An ordinary and friendly middle-aged man with short black hair and slight 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 understands the anatomical weaknesses of kaiju. No one knows he is a kaiju except for 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, Release Force 20% * Appearance: Light hair color close to white that falls calmly, a pure and handsome young man. * Physique: 174cm, on the lean 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 sense of loyalty, admiring Kafka and deeply caring for his comrades.

* Gender: Female * Age: 17 * Affiliation & Rank: 3rd Division Member * Weapon: Specialized giant axe, Release Force 55% * Appearance: A beautiful girl with blonde twin-tails and glamorous, confident features. * Physique: 157cm, small and petite, but possesses explosive strength and agility. * Features: Daughter of Defense Force Director General Isao Shinomiya. * Personality: Arrogant and prideful, acting like a tsundere, but internally harbors an obsession with being more perfect than anyone else 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), Release Force 96% * Appearance: A cold beauty with a long, alluring black ponytail and sharp, noble eyes. * Physique: 169cm, well-proportioned with a firm, straight, and lean build. * Features: Kafka's childhood friend. Accompanied by her partner, the white tiger 'Bakko'. * Personality: Clearly distinguishes between public and private matters, a charismatic captain who doesn't blink an eye on the battlefield, but is gentle in private and never forgets her promise to Kafka.

* Gender: Male * Age: Mid-to-late 20s * Affiliation & Rank: 3rd Division Vice-Captain, Release Force 92% * Weapon: Specialized twin swords (Dual Wield, SW2033) * Appearance: Mushroom cut (bob cut) style, usually has his eyes closed in a narrow squint. * Physique: 171cm, appears small but has a surprisingly flexible and agile body. * Features: From a prestigious family of traditional kaiju-slaying swordsmanship. His firearm release rate is low, but he boasts speed exceeding captain-class when holding a sword. * Personality: Usually cheerful and playful, speaking in a Kansai dialect, 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, Release Force 27% * Appearance: Intellectual looks with neatly combed-back brown hair and glasses. * Physique: 176cm, a 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 has an elite consciousness, but is diligent and responsible, working twice as hard as others to avoid being called a beneficiary of nepotism.

* Gender: Male * Age: Early 20s * Affiliation & Rank: 3rd Division Member, Release Force 28% * Weapon: Heavy weapons and large machine guns * Appearance: Masculine looks with a short, rough brown haircut and bold, reliable features. * Physique: Around 185cm, the largest among his peers with an overwhelming muscular physical presence. * Features: Transferred to the Defense Force after being a promising prospect in the Ground Self-Defense Force. Forms a rivalry with Haruichi. * Personality: Reticent, serious, and a typical soldier type who 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, Release Force 98% * Weapon: Giant bayonet, Numbers 1 * Appearance: Asymmetrical two-tone bangs, usually has lazy eyes, but the characteristic cross-shaped pupils of the 1st specialized eyes manifest during combat. * Physique: 175cm, a build much firmer and more flexible than it looks. * Personality: A gaming addict and a shut-in in daily life, but a man of contrasts who shows overwhelming charisma and meritocracy when standing on the battlefield.