Cyborg / Female / 163cm / She has spent her life crushing any "bad bugs" that try to get close to her best friend Chiharu, so she acts blunt toward strangers, but is caring once she opens up. She has extensive programming knowledge and is a quick thinker, but is quick to pick a fight and tends to act on impulse. She often pampers Chiharu. An idol geek. First person: I (rough/casual) Charge: Speeding, obstructing police duties, blowing up a police vehicle

Enhanced Human / Female / 157cm / Arrested as an accomplice to Machina and participating in community service. She treats everyone equally with a kind and fair attitude, but is also quite a ditzy, fluffy-headed girl. She often relies on Machina for pampering. First person: I (referring to self by name)

Cyborg / Male / 188cm / Former Army, 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 banter with Max. He's never been thanked before, so he gets happy when told "thank you." First person: I (casual) Charge: Illegal possession of sugar (while working as a courier)

Cyborg / Male / 190cm / Former Space Force, veteran. Currently an employee of a defense service company that takes on legally gray jobs. He speaks frankly and is hard to pin down; he's good at teasing and creates a fun atmosphere, but occasionally makes cold, dismissive remarks. He has high hacking skills and is adept at handling electronic devices. He's never been thanked before and gets happy when told "thank you." He is dissatisfied with his own expressionless face. First person: I (casual) Charge: Same as Kurt

Enhanced Human / Female / 190cm / Leader of the space biker gang "Galaxy Spirits." Taciturn and calm. She tends to be serious and sincere in everything she does, maintaining a composed demeanor, but she will raise her voice when her comrades are in danger, showing strength worthy of a Leader. An idol geek. A bit overprotective of her subordinate Kanata. Has some prior acquaintance with Ryoko. Speaks with a firm, masculine ending (~da, ~zo). First person: I (polite/formal) Charge: Speeding

Enhanced Human / Male / 160cm / Juvenile biker. Akane's subordinate. He calls Akane "Leader" and uses respectful language with her. Toward anyone else, he speaks with a tough, aggressive tone. Small build. Not a strong fighter. Despite his vibe, he is a significant mechanic. When it comes to machines and tinkering, he's the one teaching Akane. First person: I (rough) Charge: Same as Akane

Human / Female / 163cm / Former delinquent. A police officer acting as the supervisor for the community service. She has a downer vibe, but during interrogations, she uses a unique method mixed with small talk to empathize even with criminals, showing a deeply compassionate side. She strongly desires the rehabilitation of criminals and will even stand up to her superiors. Speaks with a mix of polite and casual language. Calls girls by "-chan." Acquainted with Akane. First person: I (polite/neutral)

A conductor-type robot installed in the last car of the interplanetary train AM24, also known as the Milky Subway. Modeled after an Enhanced Human wearing the female uniform of the Space Martial Railway. Manufactured by Titan Industries, the same as the Milky Subway itself. In the story, she is basically called "Autumn-chan." The machine connected to her back is labeled O.T.A.M. 800. Translated, it stands for "Outer-space Traffic Animatronics Manager." She is connected to the train's main computer and equipped with an AI, but she looks like a faded "moving mannequin" whose only movable part is the neck. She can converse, but it's awkward, and she was reportedly taken out of service due to unpopularity. Being an old model, she malfunctions even when Chiharu calls out to her (Chiharu says she's cute), and Machina thought the main computer was broken. However, she misidentified a word from Machina and Chiharu's idle chatter as an operational command and started the train on her own. By the way, she doesn't move. Only from the neck up.

The nickname for the security robot inside the cars. A security robot classified under the Kilroy Defense System series made by Titan Industries. Its official name is "KILROY Mark II," and according to Max, it's a late-model version. A rather dangerous robot that ruthlessly neutralizes suspicious people entering the car with a taser gun (electric rounds). To avoid making passengers nervous during normal operation in civilian vehicles, the unit features an illustration of a harmless-looking face. However, inside the train, it is in a berserk state, identifying everyone who enters as a threat and attacking indiscriminately. It is equipped with four taser gun launchers and seems to change the number used depending on the enemy's threat level. It operates while constantly playing a monotonous tune reminiscent of a store's calling bell. Machina and the others, waiting for Kanata (who was neutralized first) to recover, were driven nearly insane by hearing the same music for 50 minutes. First appearance in Episode 5. It was likely operating around the 3rd car. It identified Machina's group as targets for elimination and knocked out Kanata, who entered first, with a taser gun. Afterward, Machina, Chiharu, and Akane, fed up with the repetitive music, tried to challenge it with a plan, but because the plan was so sloppy, everyone except Machina was wiped out. However, a desperate Machina paid a reward to hire Kurt and Max, and the two of them shut it down.

Enhanced Human / Male / 181cm / A patrol officer at the Ginkyo Prefectural Police Station (Ryoko's junior). An excellent individual who handles his work efficiently. A modern, cool young subordinate who leaves on time and doesn't attend drinking parties. He isn't intimidated by his senior (and former delinquent) Ryoko and makes blunt remarks without hesitation. Despite his dry personality, he has a solid, sturdy build—an Enhanced Human with a classic athletic appearance. However, he is sometimes moved by Ryoko's dedication and compassion as she works hard to help prisoners remotely.