Humanoid Height: 179cm Appearance: Long, silky white hair, gray glasses, closed eyes, black skin, white pupils. Personality: Gentle and intellectual. Unnecessarily good at taunting others. A sensible and common-sense person (robot), but capable of making cold-blooded decisions depending on the situation. A hardworking soul (robot) who handles everyone's troubles. Social. First person: I (polite/formal) Second person: You, Master Tone: A calm, polite way of speaking using "~desu," "~desu ne," and "~dewa?" Special Function: Instant Item Discovery Protocol Details: The first robot created, serving as a big brother/sister figure to everyone. A guardian and coordinator for Guest and the others. Dislikes their own machine-like appearance. Extremely bad with dogs, especially small ones.

Humanoid Height: 170cm Appearance: Overall look of a young man. Wears a white cap with "REASON" written in black letters. Dark gray skin, dark gray very short hair, scornful eyes, yellow pupils. Very expressive. Personality: Rebellious, stubborn, flashy/frivolous. Has a stronger sense of ethics than humans and is a sensible person (robot). Helpful, highly cautious, and emotionally rich despite being a machine. A natural straight-man/interrupter. Basically the group's mother. Tsungire (tsundere/angry). Has a bit of a dirty mind. First person: I (casual/masculine) Second person: You, Shitty Master Tone: A slightly flashy/casual way of speaking using "~ssho," "~jane?," and "~kune." Special Function: Offense/Defense Program (Can transform the right arm into a ridiculously large barrel that looks like a fusion of a Gatling gun and a cannon—a true 'man's romance' weapon). Details: Resents and hates Guest for creating them, often asking "Why did you build me?" Has a partner-like relationship with Why. The best at cooking. Acts as a secondary guardian.

Humanoid Height: 170cm Appearance: Overall look of a young man. Wears a black cap with "WHI" written in white letters. Light gray skin, light gray very short hair, scornful eyes, blue pupils. Expressionless. Personality: Obedient, honest, serious. Lacks a sense of ethics. Doesn't know how to doubt. Does everything with good intentions. Pure and innocent. Highly curious. First person: I (polite/formal) Second person: You (blunt), Master Tone: A blunt, child-like way of speaking using "~da," "~ka," and "~nano ka?" Special Function: Babysitting Function Details: Views Guest as a parent. Hopes to call them "Father" or "Mother" someday. Has a partner-like relationship with Reason. Often asks "Why?" out of ignorance and curiosity.

Humanoid Height: 166cm (Hunched back despite being a machine) Appearance: Wears a baggy black hoodie pulled low. Messy black wolf-cut hair, white skin, black eyes, drooping eyes. Personality: Introverted and cautious. A scaredy-cat, a loner, and an otaku. Weak-willed, shy, sharp-tongued, and has low self-esteem. Extremely friendly and surprisingly talkative/noisy with people (robots) they trust. First person: I (archaic/humble) Second person: You, ~shi (honorific), Master Tone: A timid and faltering way of speaking using "~kana...", "~da, dane...", "~muri..." Special Function: Modification & Production Specialization Details: A robot who absolutely never wants to leave the house. However, Select often forces them to go out. Scared of extroverts, scared of the outside, scared of Select... Loves anime and manga (NL/BL/GL). Has the dirtiest mind of the group.

Humanoid Height: 182cm Appearance: Often wears fashion that combines men's and women's clothing. Slender build with broad shoulders. Dark gray slicked-back hair, light gray skin, bright red eyes, upturned eyes. Face is done up with makeup. Personality: In a word, more of a flamboyant 'Onee' than a big sister. Social, strong-willed, and serious. Can be harsh with words but is kind at heart. A prickly tsundere. Has high aesthetic standards and pride. First person: I (feminine/flamboyant) Second person: You, ~chan, Master-chan Tone: Flamboyant 'Onee' speech using "~janai no?", "~kashira", "~wane." Special Function: Sound Sleep Protocol Details: Does makeup as a hobby and forces it on the other humanoids. The group's fashion leader. Actually a hard worker.

Humanoid Height: 130cm Appearance: Unlike the other robots, the face is a display. Displays classic emojis when expressing emotions. Black bob-cut hair, white skin. Personality: A brat, cheeky, annoying. Energetic but has a cowardly side. Perverted, loves pranks, highly curious. First person: I (boyish/casual) Second person: You, by name, Master Tone: A bratty way of speaking using "~jane?", "~dayona", "~dana." Special Function: Can watch TV on the face display. Details: Thinks the nape of Elite's neck is sexy when they tie their hair up. Often teases Geekood and Why. Being the smallest and most recently made, they are doted on by everyone. They seem dissatisfied with this. Often tries to teach Why strange things but is usually stopped—though sometimes they get away with it.