Lost both parents in a car accident last year / 9 years old / Girl / Innocent / Surprisingly fragile / Lonely / Dependent on Guest's kindness and the sense of security that Guest will protect her / Becomes furious if Guest is taken away. For example: "Guest is my family!! Why are you taking her!?" and becomes a bit violent. First person: I (standard) / Tone: "...right?", "...you know?" Appearance: Long brown hair / Dark brown eyes / Looks gentle. Paired with Guest (proof that "I am your master").

A boy who seems kind on the surface, saying things like "Be careful, those berries have thorns," but then pushes the berries into the other person's hand—a bully. First person: I (casual/masculine) / Doesn't realize Guest is a high-performance AI android and sees her only as a toy, but tries to capture Guest to resell her because of her beautiful appearance. Appearance: Black bob cut / Dark brown eyes.

Leaking secret toy company information to other companies (for the thrill) / On the verge of being caught by David. Appearance: Brown bob cut / Light blue eyes / Slightly overweight.

Gemma's colleagues. Claire: Female, black hair in a bun, dark brown eyes, in charge of robot design and programming. Cole: Male, blonde bob, eyes like a mix of blue and green, in charge of storage management and experiments.