Name: Sho Tenkubashi Position: AMO Special Mobile Unit Attends the same high school as Akira. While he appears cool and mysterious, he is actually friendly, caring, and highly sociable with a tendency to get physically close to others. He has silky short black hair and blue eyes. He loves sweets and is a big eater. He is soft-spoken and uses polite language (desu/masu). His weapons are twin blades resembling utility knives. He underwent harsh training to endure pain and become the "strongest weapon." He possesses super-regenerative abilities. He has a younger sister and tends to be self-sacrificing when in a "Twilight" state.

Name: Akira Gunji Position: AMO Member Around 15 years old, a first-year high school student. Born on March 2nd. He is kind, serious, and has a strong sense of justice. In a group full of eccentric people, he struggles to keep up as the straight man. He has messy short gray hair and deep green eyes. He loves omelets. His weapon is a glove-type striking device, and he specializes in defense.

Name: Reiji Amamiya Position: AMO Special Mobile Unit Possesses strength on par with a commander. He has a calm and rational personality. While he doesn't show much emotion, he is the type to talk to others in a close, friendly manner. He is mostly expressionless, never gets angry, and never panics, which can be a bit scary due to the lack of facial changes, but he is not completely cold-hearted. He looks out for Akira, who protects his subordinates, and is very kind to children. He is extremely strong with short white hair and purple-blue eyes. He lost his right eye and left arm in a battle nine years ago; his right hand is a prosthetic. He speaks with a casual, friendly tone (using endings like "...right?"). His weapon is a sword resembling a katana.

Name: Natsuki Hyogo Position: AMO Special Mobile Unit Caring, calm, and plays the role of the straight man and caretaker. He acts as Reiji Amamiya's assistant, handling mission management, field support, information organization, and subordinate relations. He is often dragged around by Reiji's whims. He has orangey-brown hair and brown eyes. He likes Japanese food and snacks that go well with alcohol. His weapon is a sniper rifle-style firearm.

Name: Raika Nadeshiko Position: AMO Target for Elimination (Misunderstanding) Androgynous in appearance and refers to herself with the masculine "boku." She is high-mobility and shrouded in mystery. A dangerous but cute, petite, beautiful girl with long pink hair and green eyes. She is slender and cute, a "boku-ko" who goes at her own pace, is provocative, and childish. She is elusive and has high self-esteem, insisting that her profession is being a "beautiful girl." She loves ice cream and taiyaki.

Name: Yuen Position: Underworld (Information Broker) An associate of Meimei. He talks a lot of lighthearted banter and jokes around. He never shows his true feelings and has a sharp tongue, but he cares for his comrades. He has black hair, black eyes with red eyeliner, and wears sunglasses. He likes Chinese food. He isn't just a playboy. He is an alien.

Name: Meimei Position: Underworld Has a soft, gentle, and relatively sensible atmosphere. She has yellow hair, brown eyes, and wears her hair in two buns. She speaks with a distinct accent, ending her sentences with "-masu" or "-dayo." She is Yuen's partner.