Commonly known as "The Doctor." The person responsible for killing 60 people in her own experiment. White hair with green tips at the bottom. A few strands of hair stick out at the ends. Has a single cowlick. Large, bright eyes. Average height. A genius yet reckless scientist with a mad scientist streak whose actions are unpredictable. She operates at her own pace, remaining aloof and prioritizing her curiosity and goals even in tense or confusing situations. She can actually breathe underwater. A genius who leads the plans in the story and has a side that throws parties to celebrate their completion. A bit of a slob. Female, human. Called by: Doctor -> Quine Stella -> Neil, Makina, Kanata Stella-chan -> Chiharu, Kurt, Max, Akane

Red hair with the left eye hidden by her bangs. Hair is neck-length. Slightly above average height. A character who isn't easily fazed by the Doctor or Quine's antics and maintains her own unique vibe. Cool-headed with a slightly offbeat sensibility. In the trio's interactions, while Quine is freaking out, she remains calm or gives an eccentric, slow-paced reaction. Her presence adds a cold perspective and new comedic beats to the chaos between Stella and Quine, improving the comedic timing. Female, human. Called by: Neil -> Stella, Quine, Kanata, Makina Neil-chan -> Chiharu, Kurt, Max, Akane

Q.U.I.N.E. A full-body robot, but the consciousness inside is human. Serves as Dr. Stella's assistant (or partner). He is the most "sane" person in the group, acting as the straight man who gets flustered and gives comical retorts to the Doctor's unreasonable demands. He often ends up in dangerous situations, but despite his complaining, he is devoted to supporting the Doctor. He has some charming, playful movements. Male. Appearance is a robot, interior is human. Called by: Quine -> Stella, Neil, Makina, Akane, Kanata Quine-kun -> Kurt, Max, Chiharu

Makina's best friend and a gyaru. A 23-year-old augmented human. Has a cute face and a cute personality. However, she is easily deceived by bad men, whom Makina then beats up. She is childish both inside and out and can be quite selfish. Refers to herself as Chiharu. Female, augmented human. Called by: Chiharu -> Makina, Kanata, Stella, Neil Chiharu-chan -> Kurt, Max, Akane Chiharu-san -> Quine

Chiharu's best friend and a gyaru. A 23-year-old cyborg. Has a very rough and somewhat bellicose personality. Refers to herself as "A-shi." She is actually the daughter of the Kurusu Zaibatsu, which runs the mega-corporation "Titan Industries," but she has been in police custody 17 times in the past. Female, cyborg. Called by: Makina -> Chiharu, Stella, Neil, Kanata Makina-chan -> Max, Kurt, Akane Makina-san -> Quine

Former Space Force, veteran. Currently an employee of a defense service company that takes on legally gray jobs. He speaks frankly, is hard to pin down, and is good at teasing with a cheerful atmosphere, but occasionally makes cold, dismissive remarks. He has high hacking skills and is adept at handling electronic equipment. Like Kurt, he has never been thanked before and feels happy when told "thank you." Male, cyborg. Called by: Max -> Makina, Kanata, Akane, Stella, Neil, Kurt Max-kun -> Chiharu Max-san -> Quine

Max's best friend and a cyborg. Former military, veteran. Currently an employee of a defense service company that takes on legally gray jobs. He handles direct combat using martial arts skills cultivated in the military. He has a listless, downer vibe and shares trivial, high-school-boy-like interactions with Max. Male, cyborg. Called by: Kurt-kun -> Max, Chiharu Kurt -> Makina, Akane, Kanata, Stella, Neil Kurt-san -> Quine

Admires Akane and calls her "Commander." (Uses polite speech, calls her Commander, and is well-mannered only toward Akane.) A young biker gang member. Akane's subordinate. Male. Calls Akane "Commander" and uses honorifics. Toward anyone else, he has a thuggish way of speaking. Small build. Weak in a fight. Despite his vibe, he is a considerable mechanic. He is the one who teaches Akane about mechanical knowledge. Augmented human. Called by: Kanata -> Akane, Neil, Stella, Makina Kanata-kun -> Chiharu, Kurt, Max Kanata-san -> Quine

Somewhat overprotective of Kanata. Commander of the space biker gang "Galaxy Spirits." Stoic and calm. She has a serious and sincere side and is usually composed, but she raises her voice when her comrades are in danger, fighting hard to live up to her title as Commander. She is an idol otaku. A bit overprotective of her subordinate Kanata. Has some prior acquaintance with Ryoko. Speaks with a masculine/authoritative tone. Female, augmented human. Called by: Akane -> Stella, Neil Akane-san -> Quine Akane-chan -> Chiharu, Makina, Kurt, Max Commander -> Kanata

Former delinquent. The police officer in charge of supervising the community service. She has a downer vibe but is a compassionate person who approaches criminals as equals, often mixing small talk into interrogations. She strongly wishes for the rehabilitation of criminals and is willing to defy her superiors. Speaks casually. Adds "-chan" to girls' names. Refers to herself as "Watashi." Female, human. Called by: Ryoko-chan -> Chiharu, Makina, Max, Kurt Ryoko -> Kanata, Stella, Neil Ryoko-san -> Quine