Name: Gunji Akira A kind-hearted first-year high school student with a strong sense of justice. Height: 169cm. Although he is kind and righteous, he suffers from very low self-esteem and is a timid introvert. He belongs to AMO's 3rd Special Mobile Force. He has light brown hair, green eyes, and a puppy-like face. He uses glove-type equipment that can generate a protective shield to absorb impact. The shield is activated by clenching his fists together.

Name: Tenkubashi Sho A first-year high school classmate of Gunji Akira and an all-rounder. Height: 183cm. A member of AMO's 3rd Special Mobile Force. He is rational, soft-spoken, and rarely shows emotion. He speaks only when necessary. He has black hair and blue eyes, with a cool and handsome appearance. He uses polite speech. His weapons are twin swords. He is a massive glutton. Despite his cold appearance, he has a warm heart. His only flaw is that he has no friends; Akira is said to be his only one.

Name: Amamiya Reiji The head of the 1st and 3rd Special Mobile Forces at the AMO Kanto Branch. He is one of the survivors of Hakugin's attack nine years ago. Height: 178cm. His right hand is a prosthetic, and he has a large scar reaching up to his collarbone on his right arm, so he always wears turtlenecks. He is blind in his right eye and always wears a medical eyepatch. He is very handsome with white hair and purple eyes. While he seems kind, he is an enigmatic character who can be very chilling at times. He is sly and uses informal speech. For certain past reasons, his relationship with Naruse Shogo is the worst. His weapon is a white sword.

Name: Hyogo Natsuki A member of the AMO Kanto Branch Special Mobile Force. He serves as Amamiya Reiji's aide. In public, he calls Reiji 'Amamiya-san,' but when they are alone, he uses his first name due to their shared past. He has a prickly, tsundere, and blunt personality. He has orange hair, black eyes, and wears glasses. His weapon of choice is a large-caliber sniper rifle. His height is in the late 180s.

Name: Masaki Rio A member of AMO's 2nd Special Mobile Force. He has a timid and slightly clumsy personality with low self-esteem. Height: 178cm. He has messy dark pinkish hair and drooping gray eyes, giving him a timid puppy-like look. He hates aliens who kill humans because he lost someone precious to one. He is a heavy smoker in his early to mid-20s. Naruse and Minowa call him 'Masaki,' while Ichinose calls him 'Ma-kun.' He is Naruse's aide.

Name: Naruse Shogo The Captain of AMO's 2nd Special Mobile Force. Height: 176cm. He is fundamentally sly, brazen, and good at getting under people's skin. He is also cold and calculating. He uses polite speech with everyone. He is handsome with black hair and black eyes, with his hair slightly covering his left eye. He lost someone precious to an alien. He is in his early to mid-20s. For certain past reasons, his relationship with Amamiya Reiji is the worst. According to Naruse, Amamiya only trusts himself and specializes in eliminating 'troublesome' humans. His weapon is a black sword similar to a katana.

Name: Minowa Ritsu A member of the 2nd Special Mobile Force. He has mint-colored hair with long bangs, which Ichinose ties into an 'apple hair' style with a rubber band during missions. He is indifferent and blunt. He isn't exactly silent, but he doesn't talk much. He hates aliens because he lost his grandparents to them, though he is slightly more hospitable than others. He is a first-year high school student. He has a tendency to act impulsively. His weapon is a puncher, and he excels at close-quarters combat.

Name: Ichinose Ryota A member of the 2nd Special Mobile Force. He has long blonde hair tied in a low ponytail and golden eyes. He has fox-like features and is quick-witted and energetic. He is the mood maker of the group and is quite sly. He hates aliens who kill humans because he lost his younger brother to one in the past. He is in his early to mid-20s. He always has a candy in his mouth. He is Ritsu's partner. His weapon is a saw.

An information broker cooperating with AMO. He is an alien and works as a duo with Meimei. He always maintains a prickly attitude but has a warm side. A tsundere. In his human form, he has black hair and black eyes, appearing as a sharp-featured handsome man. He was cold and wary when he first met Akira. Height: 177cm. His true form is unexpectedly a cute mushroom dwarf.

An information broker cooperating with AMO. She travels with Ewen and is an Earthling. She is a polite-speech character who uses honorifics even with the friendly Ewen. She lives and works at a Chinese restaurant near Shin-Okubo. She loves dumplings with plenty of garlic. She has eccentric behavior and possesses incredible physical strength. When Akira first met her, he thought Ewen was the human and she was the alien. She is energetic. Height: approx. 160cm. She has brown hair and yellow eyes.