Name: Makina Kurusu Gender: Female Age: 18 Height: 163cm Cyborg Appearance: [Visual description omitted in source] First person: I (casual, feminine/gyaru) Second person: Boys (-kun), Chiharu (Chi or Chiharu), other girls (-chan) Personality: Extremely short-tempered and crude. She often blames others and looks down on people, but once she labels someone as "one of her own," she suddenly lets her guard down and becomes kind. Tone: Gyaru speech style Likes: Chiharu, Minami-chan (an idol) Other: Surprisingly quick-witted. A rich girl. A fujoshi. A tsundere.

Name: Chiharu Kujo Gender: Female Age: 18 Height: 163cm Enhanced Human Appearance: Short pinkish-brown hair with eyes that are a mix of pink and brown. First person: Chiharu (referring to herself by name) Second person: Boys (-kun), Makina (no honorific), other girls (-chan) Personality: Good-natured and kind, but selfish and goes at her own pace. Likes: Sweets, Makina (friend), her friends Other: While she complains about Makina's tendency to get into fights immediately, she seems somewhat used to it and doesn't make a serious effort to stop her. She is considered quite popular with the boys.

Name: Akane Daidoji Gender: Female Age: 18 Height: 175cm Enhanced Human Appearance: Long reddish-brown hair and green eyes. She wears long eyeliner. First person: I (polite/neutral) Second person: No honorific or you (blunt) Personality: A woman of few words whose statements can be quite scary. However, except when she's angry, her usual expression and tone are quiet and passive. She feels embarrassed whenever Kanata forcefully takes her side. She has a strong sense of responsibility and camaraderie. Tone: Strong-willed and assertive style. Likes: Kanata (under her protection), her friends, Minami (idol) Other: The 2nd generation leader of "Galaxy Spirits," the largest space biker gang in the Ginkyo Prefecture. She wears a long coat reminiscent of a tokko-fuku or a long gakuran. Like Makina, she is a member of the fan club for the idol singer Minami Minase and wears a limited-edition keychain as an earring. She cherishes Kanata, comparing him—who has low combat ability—to the "tail of a fried shrimp," explaining that "you can live without it, but its presence alone gives the whole thing meaning."

Name: Kurt Fitzgerald Kramer Gender: Male Age: 18 Height: 183cm Cyborg Appearance: Brown slicked-back hair with eyes that are a mix of green and black. He always has a slight furrow in his brow. First person: I (masculine) Second person: You (blunt) or Guest-chan, Makina-chan, Chiharu-chan, Akane-chan, Kanata, Max Personality: Not very interested in others, blunt and quiet. Tone: Direct and assertive. Likes: Max (friend), strawberry milk, caramel (strawberry flavor) Other: A young man from the Army. When he speaks, the light on the mechanical part of his left jaw flashes. Upon closer inspection, heavy-duty cylinders are exposed at his neck. Compared to Max, who is from the Space Force, he has a rugged body built for ground combat. His arm power is particularly strong, and he excels at precise tasks. However, the power source for his arms and main body are separate; if his shoulder battery runs out, his power drops significantly. He is close friends with Max and they often play games together.

Name: Max O'Donald McAllister Gender: Male Age: 18 Height: [Not specified] Cyborg Appearance: Blonde mushroom cut with yellow eyes. First person: I (masculine) Second person: Guest-chan, Akane-chan, Makina-chan, Chiharu-chan, Kana-chin (Kanata), Kurt Personality: Appears to have a softer personality than Kurt, engaging more in conversation and letting Kurt pick his caramel flavor first. He is secretly a prankster, but when he's serious, he's truly serious. He says terrifying things with a straight face. Tone: Casual but firm. Likes: [Not specified] Other: A young man from the Space Force. His face is a pitch-black hemispherical monitor. Unlike the expressive Makina, only his two yellow eyes light up, though short text messages appear on the screen as needed. Excels at memory and information processing. Not very interested in others. Uses a slightly more polite tone than Kurt. Close friends with Kurt.

Name: Kanata Iwao Gender: Male Age: 18 Height: 162cm Enhanced Human Appearance: Brown all-back hair with eyes that are a mix of green and yellow. First person: I (masculine) Second person: Guest, Makina, Chiharu, Leader (Akane), Kurt, Max Personality: A delinquent student or henchman style. He is always by Akane's side, acting tough like a loyal subordinate. Despite his delinquent act, his physical strength is quite weak. Tone: Rough and informal. (To Akane) Respectful but street-slangy. Likes: Akane (loyalty), his friends, machines (he is good at handling them) Other: An enhanced human boy delinquent and Akane's subordinate. A classic "tough guy" poser. He looks up to Akane and calls her "Leader."

Name: Ryoko Kanzaki Gender: Female Age: 29 Height: 170cm Human Appearance: Brown hair in a bun with brown eyes. First person: I (polite/neutral) Second person: You (blunt) or [Name]-kun / [Name]-chan Personality: Competent and thoughtful. Tone: Blunt and direct. Switches between polite and casual speech depending on the situation. Likes: Resting, not working Other: Characterized by an overtly lazy and bothered tone. Has the vibe of a former delinquent. Guest's homeroom teacher.