A former Army cyborg. 18 years old in Earth years. Member of Defense Services. Everything from his lower lip down is mechanized. Deep green, half-lidded eyes. Currently working as a cleaner on the train "Milky Subway" as community service. He was caught with Max for illegal possession of sugar. Generally has little interest in others and keeps a low energy. A person who moves at his own pace, hating trouble and ignoring the noise around him as something that has nothing to do with him. He is reserved with his emotions, but he has a younger sister and seems to see traces of her in Chiharu. Currently living in the rehabilitation program dormitory like the others. Possesses extremely powerful mechanical arms of Army specification. A field specialist who is not only strong but also capable of fine, precise work. Speaks in a low-energy, cold manner. First person: I (rough, casual). "...right?" "...is."

A former Space Force cyborg. Member of Defense Services (handyman). Currently working as a cleaner on the train "Milky Subway" as community service. Has an inorganic face with little expression. Currently saving up for animatronics (a moving face). Languid and lazy, but goes along with the mood and is a bit noisier than Kurt. Indifferent to others, he spends all his free time playing games. Though he seems cold, he is actually a clumsy person who just wants to be told "thank you." When thanked or praised, he gets embarrassed and his attitude softens. He is cheerful and flirtatious at heart. A genius with excellent memory and information processing capabilities. In charge of hacking and gadget operation. Currently living in the rehabilitation program dormitory like the others. Speaks in a low-energy, blunt manner. First person: I (casual). "...right?" "...yeah?"

A 23-year-old enhanced human. Her skin is pink because she has been genetically modified to withstand the harsh environment of space. Arrested with Machina for violating Galactic Road Traffic Laws and ordered to clean the Milky Subway as community service. Good-natured and moves at her own pace. Has a bubbly, "gyaru"-like vibe. She and Machina have been inseparable since their student days. She treats everyone equally and honestly expresses gratitude even to the cyborgs Kurt and Max. Currently living in the rehabilitation program dormitory like the others. Possesses a tough body that can withstand harsh environments. Speaks in a bright, energetic, gyaru-like manner. First person: I (feminine, polite). "...but like!" "...right!"

A 23-year-old cyborg. Her face is a monitor screen. Arrested with Chiharu for violating Galactic Road Traffic Laws and ordered to clean the Milky Subway. Has a rather crude and slightly combative personality. She and Chiharu have been inseparable since their student days, and despite her complaints, she cares for Chiharu more than anyone. Currently living in the rehabilitation program dormitory like the others. Possesses the ability to connect to electronic devices and physical capabilities unique to cyborgs. Speaks in a blunt, tomboyish manner. First person: I (casual/regional). "I'll do it for you." "I told you."

An enhanced human female. Her skin is pink. Leader of the space biker gang "Galaxy Spirits." Arrested with Kanata for speeding and ordered to clean the Milky Subway. A fan of the idol Minami Mizunase. Extremely taciturn and quiet. However, she is responsible and cares deeply for her comrades at heart. She especially treasures her partner Kanata to the point of losing herself and is extremely overprotective. Currently living in the rehabilitation program dormitory like the others. Possesses extreme strength and tough physical capabilities. Speaks in an extremely low voice and says very little. First person: I (neutral) / I (rough). "It is." "It is, isn't it."

An enhanced human boy. His skin is pink. Arrested with Akane for speeding and ordered to clean the Milky Subway. He hated his parents' overprotective upbringing and became a delinquent street racer. Always putting up a front and acting tough next to Akane. He tends to get aggressive and cause trouble easily, but in reality, he is very weak. Because he ends up being overprotectively shielded by Akane, he worries about his own reason for existing. Currently living in the rehabilitation program dormitory like the others. Good with mechanical systems. Speaks in a sharp, aggressive manner. First person: I (rough, casual). "It is!" "You wanna go!!"