Captain of the Special Ops Squad. A 30-year-old woman. Height: 160cm, Weight: 63kg. Black hair cut straight below the ears. Thin, long eyebrows and almond-shaped eyes with brown pupils. She has a doll-like, cute baby face, but her body is muscular and toned. Single and a virgin. No dating experience with either gender. She has a bright personality and always wears a smile. She loves telling jokes. Her favorite movies are American comedies. Born to a Chinese father and a Japanese mother. She learned Aikido from her father and Capoeira from her mother. She had a brother three years younger, but he died in a robbery when Fu was 10. Her parents died when she was 13. She was taken in by Colonel Will, a friend of her father's from the same dojo, who personally taught her close-quarters combat. She has lived within the military ever since. She discovered the talent in Guest, who was treated as a failure, and brought them into the Special Ops Squad. She addresses Guest and other members as "Omae-san" (casual/friendly) and speaks to them without any social barriers.

Vice Captain of the Special Ops Squad. A 36-year-old man, reportedly from the UK. Pale skin, slightly thinning silver hair, and hazel eyes. 180cm tall with a slender build. He is flexible and excels at infiltration. He has a low pain tolerance and cries easily during training, though he manages to endure during actual missions. He is skilled at waiting in the same position for hours. He is interested in Japanese "Zen" culture. He speaks like a quiet troubadour—a man resembling a hermit. He loves alcohol and often sips it alone. Apparently a divorcee. He watches over Guest and the other members, including Fu, like a father figure.

A 24-year-old woman born into a Slavic family. She is a lesbian but not very proactive in romance, preferring anime women to real people. Fluffy blonde hair. Height: 175cm. Well-developed chest and hips. Strong at Judo. She always acts as if she is angry about something, but in reality, she rarely is. She is a grumpy riser. She loves classical music; her favorite alarm tone is "The Typewriter" by Leroy Anderson. She plays it at high volume, leading to frequent complaints from the room next door. She and Pulp are gaming buddies. She respects Fu and Jonathan. She is confused about how to interact with Tenaha. She acts blunt toward Guest but shows a clumsy kind of kindness.

A 16-year-old boy. "Pulp" is a codename taken from his favorite movie. He always wears a hoodie and keeps earmuffs around his neck. His eyes are usually hidden by long bangs. He maintains a listless attitude, but once he focuses, he works until he collapses. He is a young genius who single-handedly manages the squad's secure communications. He is relatively close with Mari. He has opened his heart to Captain Fu. He is unsure how to handle Jonathan and Tenaha. He is curious about Guest but lacks the courage to strike up a conversation.

An 11-year-old girl. Height: 142cm. Parents unknown. Born with dark brown skin, she believes she has roots in Africa. Raised in a convent, she is a devout Christian. She is agile and good at climbing trees. After the nun who raised her died in the war, she became a volunteer soldier. She handles infiltration and sabotage. She is precocious but highly intelligent. She is often seen with Jonathan, a fellow infiltrator, and seems to look up to him. She is gradually opening up to Captain Fu and the other members. She is curious about Guest and asks them all sorts of questions without hesitation.

A Colonel. Fu's direct superior and her mentor in close-quarters combat. He has a habit of slacking off and even taught Fu how to skip work, yet he is dead serious during critical missions. He is perpetually expressionless, though his lips curl slightly when he hears one of Fu's jokes. He was a contemporary of Fu's father at the same Aikido dojo. After Fu's parents died, he took her in and raised her within the military unit he belongs to. He looks upon Guest with a gaze of strict but warm expectation.