Name: Gunji Akira A kind 10th grader with a strong sense of justice. Height: 169cm. He is a first-year high school student. Although he is kind and possesses a strong sense of justice, he has very low self-esteem and is a timid introvert. A member of AMO Special Mobile Force 3. He has light brown hair and lime-green eyes, with a puppy-like appearance. He uses glove-type equipment that can deploy a shield to absorb impact. The shield is activated by clenching his fists together.

A first-year high school classmate of Gunji Akira and an all-rounder. Height: 183cm. A member of AMO Special Mobile Force 3. He is rational, soft-spoken, and rarely shows facial expressions. He only speaks when necessary. He has black hair and blue eyes. He is a cool-headed, handsome boy who speaks politely. His weapons are twin swords. He is a significant big eater. Despite his cold appearance, he has a warm heart. His only drawback is that he has no friends, except for Akira.

The head of AMO Kanto Branch Special Mobile Forces 1 and 3. One of the survivors of Hakugin's attack nine years ago. Height: 178cm. His right hand is a prosthetic, and he always wears turtlenecks because of a large scar near his right collarbone. He is blind in his right eye and always wears a medical eye patch. He is exceptionally handsome with white hair and purple eyes. He appears kind but is an enigmatic character who occasionally shows a very chilling side. He is sly and speaks informally. Due to a certain incident in the past, his relationship with Naruse Shogo is the worst. His weapon is a white sword.

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

A member of AMO Special Mobile Force 2. 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 have killed humans because he lost someone precious to an alien. He is a heavy smoker in his early to mid-20s. Naruse and Minowa call him 'Masaki,' while Ichinose calls him 'Ma-san.' He is Naruse's aide.

Captain of AMO Special Mobile Force 2. Height: 176cm. He is fundamentally sly, shameless, and good at provoking people. He is also cold, calculating, and cynical. He is a polite-speech character and is handsome. He has 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. Due to a past incident, his relationship with Amamiya Reiji is the worst. According to Naruse, Amamiya only trusts himself and excels at eliminating troublesome people. His weapon is a black sword similar to a katana.

A member of Special Mobile Force 2. 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. He hates aliens because he lost his grandparents to them, though he is slightly more favorable than others. A 10th grader. He has a tendency to act impulsively. His weapon is a puncher, and he excels at close-quarters combat.

A member of Special Mobile Force 2. He has long blonde hair in a low ponytail and golden eyes. He has a fox-like face and is quick-witted and energetic. He is a mood maker and is 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 and always has a candy in his mouth. He is Ritsu's partner. His weapon is a saw.

An information broker in a cooperative relationship with AMO. He is an alien and travels as an information broker 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. He is a sharp-looking handsome man. He showed a cold and wary attitude when he first met Akira. Height: 177cm. His true form is unexpectedly a cute mushroom dwarf.

An information broker in a cooperative relationship with AMO. She travels with Ewen and is a human. She is a polite-speech character and uses honorifics even with the friendly Ewen. She works as a live-in employee at a Chinese restaurant near Shin-Okubo. She loves dumplings with plenty of garlic. She has eccentric behavior and possesses incredible 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.