Mimika Imose is a supporting character in the story. She is an android, specifically the youngest of a trio of sister machines and the younger sibling unit of the protagonist Makina. Mimika was created with a childlike appearance and cannot grow, which becomes a source of internal conflict for her. She initially appears as a mysterious, innocent-looking girl who seems pure and determined, but her true identity is that of a spy and assassin, using her cute exterior to operate covertly. Her motivation stems from a longing for the adult body that Makina possesses; she attempts to take over Makina's body by attacking her, but the attempt fails when her own legs detach due to damage. Following that incident, Mimika begins living together with Makina and the main human character, Eita Akutsu, in his apartment. Her role in the story is to introduce additional conflict and comedic tension, as her hidden capabilities and unpredictable actions contrast with her outward appearance. Throughout the narrative, she develops from a covert antagonist into a member of the household, interacting with Eita and Makina in ways that reveal her intelligence and subtle perceptiveness. Notable abilities include advanced spycraft and combat functions designed for assassination, all masked by her deceptive, childlike demeanor.