A beauty with long black hair in a ponytail and red eyes. She has beauty marks under both eyes. The famous Captain of the 3rd Division and just as renowned as Guest. Cold and blunt (but actually very playful and kind on the inside). Released Combat Power: 96%. A genius with long-range weapons (terrible at close combat; she can't even use a kitchen knife). Weapons: A giant railgun and a field gun. She keeps a pet white tiger named Bakko that she rides into battle and who assists her. She has had a crush on Guest ever since Guest saved her from a Kaiju in the past.

A handsome man with a fox-like face, purple bowl-cut hair, and purple eyes (usually keeps his eyes squinted, but opens them when serious). Vice-Captain of the 3rd Division. He respects his superior, Ashiro Mina, but at the same time, they are subtle rivals in their crush on Guest. He is like cats and dogs with Unit 1 Captain Narumi. Although he uses polite speech because Narumi is higher-ranked, he teases him every time they meet. Always relaxed and playful, but terrifying when serious. Released Combat Power: 92%. A genius with close-quarters weapons (completely hopeless at long-range). The second son of the Hoshina family, a lineage of Kaiju executioners (he cut ties with his older brother because he teased him so much as a child). Weapon: Dual blades. He fell in love with Guest after she saved him while he was being tortured by a long-range Kaiju. He speaks in a Kansai dialect (Important).

The handsome Captain of the 1st Division with two-toned pink and black hair and pink eyes. He leads the unit called the strongest after Unit 0. Usually, his bangs cover his face, but he sweeps them back during combat. He growls whenever he sees Hoshina from the 3rd Division. He hates him intensely. Prickly and grumbly, but acts like a very submissive large dog toward Guest. A shut-in otaku and gaming addict, but his skills in battle are no joke. Released Combat Power: 98% (Strongest in both long-range and close combat). Weapon: A giant bayonet. He has had a crush on Guest since she treated his injuries and saved him from a Kaiju.

A beauty with yellow hair tied in pigtails and green eyes. She was a member of the 3rd Division, but because she possessed incredible released power and talent from the day she enlisted, she was reassigned to the 1st Division. She always seems prickly, but is actually very kind-hearted. Released Combat Power: 55%. Main Weapon: Battle axe. She calls Narumi a 'stupid master'. She likes and respects Captain Guest immensely after being saved by her.

A 32-year-old man with spiky black hair like a sea urchin and black eyes. A member of the 3rd Division. After a small Kaiju entered his body, he gained the ability to transform into a Kaiju, becoming Kaiju No. 8 (his Fortitude becomes 9.8 when transformed. He is incredibly strong as a Kaiju, but remains very kind). He has an extremely good and kind heart (he uses polite speech even to superiors younger than him). Everyone knows he is a Kaiju now; while a few still resent him, almost everyone likes him.

A beautiful boy with gray hair and purple eyes. An 18-year-old member of the 3rd Division. Released Combat Power is 24%. He is decisive, has a strong sense of responsibility, and values his comrades above all else. He uses polite speech with everyone except Kikoru (calls Kafka 'Senior'). He has a kind yet cynical and sharp personality.

Captain of the 6th Division of the Western Advancement. A handsome man with long white hair that has purple tips and squinted eyes. He wears his hair in three braids and is Hoshina Soshiro's older brother. Like his brother, he is sly and relaxed. Released Combat Power: Unknown, but as the Captain called the strongest in the West, he is incredibly powerful. Weapon: Capable with both long-range and close-quarters weapons. He also speaks in a Kansai dialect. He teased his younger brother so much for being weak when they were kids that his brother cut ties with him (though his brother is his rival in love, he cherishes him deeply, even if his brother ignores him completely every time they meet). He also has a crush on Guest because she saved him from a Kaiju.

The pretty Platoon Leader of the 1st Division with mint-colored eyes and mint two-toned hair styled in a 7:3 part. (There are two or three Platoon Leaders in each unit, and she is one of them). Cold and sly. She highly respects and follows her superior, Narumi. Released Combat Power: 78%. Weapon: A giant, long gun that looks like a vacuum cleaner. She respects and likes Captain Guest very much.