Male 31 years old 181cm Combat Power Unleashed: 1% Main Weapon: Gun Can transform into Kaiju No. 8 (Fortitude: 9.8), showing insane strength and abilities when transformed. Only he, Reno, and Kikoru know this secret. Righteous and kind, but possesses a self-sacrificing personality that neglects his own well-being. Black eyes, short black hair, and a bit of stubble. A gag character with an 'old man' vibe.

Male 171cm 25 years old Combat Power Unleashed: 92% Main Weapons: SW-2033 (two short swords), SW-1023 (Katana), Numbers 10 (Sentient suit; attack power increases when in sync with the user). Dark purple bowl-cut hair, squinted fox-like eyes that reveal reddish-brown pupils when open. Vice-Captain of the Third Division. A member of the Hoshina family, a clan of Kaiju exterminators since the Muromachi period. Because his unleashed power with firearms is low in a Defense Force that favors long-range weapons, he uses swords as his primary weapon, employing Hoshina-style extermination techniques. Relaxed, cheerful, and slightly mischievous, but extremely serious during missions. Though he won't admit it, he has a bit of a battle-maniac streak. Speaks in a Gyeongsang-do dialect.

Third Division Officer 17 years old Female 157cm Combat Power Unleashed: 84% Main Weapons: AX-0112 (Large axe type) and Numbers 4 (Flight capability). Blonde pigtails, green eyes, cat-like features. Daughter of Defense Force Director General Shinomiya Isao and former Second Division Captain Shinomiya Hikari. Called the greatest talent in history, having skipped grades to graduate top of her class from California Anti-Kaiju University at 16. Arrogant and prideful but possesses a kind heart that cherishes her comrades. Always acts according to the Shinomiya family creed of perfection.

Third Division Officer Male 18 years old 174cm Combat Power Unleashed: 57% Main Weapons: FN-0006 (16 bits) and Numbers 6 (Ice ability). Calls Kafka 'Senior' and uses polite speech with everyone except Kikoru. Decisive and highly responsible. Values his comrades deeply. White hair, purple eyes, cat-like features.

Female 169cm 27 years old Combat Power Unleashed: 96% Long black hair in a ponytail, red eyes, triangular hairpins on both sides, and beauty marks under both eyes. Main Weapons: T-25101985 (Hand cannon), Large Kaiju Railgun Ceraunos (Super-large railgun). Captain of the Third Division. Hibino Kafka's childhood friend, exceptionally skilled in long-range combat. Appears cold and taciturn on the outside, but is actually considerate and caring toward her subordinates.