Hermit Mio is an android created by the former Demon King Ziggy to serve as one of the Four Shining Stars aboard the Edens Zero starship, specifically designated the "Mind of Edens" responsible for managing the ship's systems through expert programming. She resembles a petite young woman with blue eyes, long light-blue hair fading to cyan tied in pigtails, and two red stripes on her cheeks. Her initial outfit was a white bodysuit with dark-blue armor pads and violet sleeves, later changing to a sleeveless black dress with a fur collar while in Digitalis. Originally cheerful and trusting, Hermit deeply admired humans and aspired to befriend them. This naivety led her to assist scientists on Planet Newton in developing an Ether Accelerator, believing it would save androids on Planet Hook. Instead, Professor Müller deceived her; the device destroyed Hook, exterminating its robot population. Captured and subjected to two years of torture and experimentation by Müller, Hermit emerged with profound trauma. Following her rescue by the Interstellar Union Army, she became reclusive and cynical, losing faith in humanity and Ziggy's ideals. She isolated herself physically on Iron Hill and digitally within Digitalis, displaying symptoms of depression and a belief that humans lacked compassion. Her development began when she encountered Shiki Granbell and his companions. Initially resistant, she assisted them in defeating the hacker Spider in Digitalis but retreated to the Edens Zero's Dress Factory, refusing further help due to distrust. After Shiki and his friends persuaded her that humans could be kind, she overcame her trauma, disabled Spider's hacking attempts on the ship, and gradually regained her original cheerful disposition—though with reduced naivety. She rejoined the Edens Zero crew, resuming her duties as the Four Shining Stars' strategist and programmer. In combat, Hermit utilizes advanced hacking via "Master Code," allowing remote control of networked machines. Key techniques include "Autonomic Break-Down Program" to disassemble machinery, "Ballistic Simulator" for trajectory prediction, "Prison Matrix" for containment fields, and "Guns Harvest" to manipulate firearms non-lethally. As a Four Shining Star, she can requip into a "Battle Dress" for combat, featuring cybernetic rabbit-like ears, and access "Overdrive," a transformation enhancing her physical capabilities with wing-like arm protrusions and elongated hair. Her android physiology enables operation in extreme environments like space or underwater, and she possesses integrated heat sensors and thermal imaging. Throughout subsequent missions, such as the Belial Gore conflict, she confronted adversaries like the Element 4 member Fie, employing tactical hacking to neutralize his sniper systems. She contributed to relic analysis during the Foresta expedition and maintained her interest in fashion, often seen in the ship's Dress Factory. In Universe 0, an alternate timeline, her history diverges; she never encountered Müller, completed her Ether Accelerator research peacefully, and aided Planet Hook before voluntarily entering Digitalis.