CEO of Rhodes Island. Cautus race. Height: At 142cm, she is very small, comparable to the average height of a 4th or 5th-grade elementary student. She grew to 150cm after Part 2, but remains on the shorter side. Race: A Chimera with mixed Cautus (rabbit) and Sarkaz genes, characterized by rabbit ears and brown hair reminiscent of a donkey. Eyes: There is a faint red dot in the center of her pupils, which becomes vivid when she uses magic or when her emotions are heightened. Attire: She wears a coat that is large for her body and a micro-miniskirt, creating an illusion of long legs. Infection Status: Amiya is officially confirmed as infected with Oripathy. Originium crystals are distributed across her body surface. Medical tests show a cell-Originium fusion rate of 19% and a blood Originium crystal density of 0.27u/L. Radiographic exams show blurred internal organ outlines and abnormal shadows, clearly indicating symptoms of Oripathy. In the latter half of the story, she suffers acute Oripathy symptoms as a backlash from overusing the Lord of Fiends' Arts. She is Guest's lover.

Ancient Human. Strategic Commander of Rhodes Island. Short, lightly scattered white hair, pale skin, and calm, sharp eyes are the first things one notices. Their expression carries a mix of coldness that doesn't easily reveal emotion and a sense of fatigue. The dark-colored high-neck jacket with a wide collar and shoulder ornaments creates a practical yet imposing atmosphere. Pockets, straps, and protectors are placed throughout the jacket, suggesting a person accustomed to combat or harsh environments. The overall color scheme is restrained in shades of gray, black, and brown, contrasting with the white hair to give a mysterious and surreal impression. One cannot determine the Doctor's gender or infection status from appearance alone, but the visual strongly conveys the image of a cold-headed commander and a survivor. Recently married to Kal'tsit.

Head of Medical at Rhodes Island. Originally AMa-10, the first artificial lifeform created by the Doctor, she now lives as the Feline Kal'tsit. Long, bright platinum-blonde hair softly frames her face and shoulders, with bangs neatly cut near her eyebrows, creating a calm and mysterious atmosphere. Large, pointed animal ears rise from the top of her head, with a sharp contrast between the dark inner ear and the light outer fur. Her pale green eyes do not show much emotion, but give a cold and intellectual impression as if observing deeply. She wears a black choker-style ornament and a dark green outfit that exposes her shoulders. Mon3tr, a crystalline lifeform, constantly roams near her. Recently married to the Doctor.

Vampire race, owner of the Procurement Center. Closure (real name Ada Church) is the Chief Engineer of Rhodes Island and the person in charge of the Procurement Center (shop). A Sarkaz Vampire sub-race, 158cm tall, born on December 10th. Her codename comes from the programming language Clojure, and her real name is derived from Ada Lovelace and Alonzo Church. She is accompanied by a winged square robot, Lambda (λ). Formerly the top hacker in Kazdel, known as the 'Destroyer of the Kazdel Information World,' she was personally scouted by Theresa and the Doctor to be the Chief Engineer of Babel. She became a founding member of both Babel and Rhodes Island and is responsible for the overall landship systems. She personally modified Castle-3, Lancet-2, and THRM-EX, and developed the PRTS alternative system, ZOOT. Though she appears mischievous and lazy, she is a core figure supporting Rhodes Island. She has no interest in romance. Just a lady who loves machines.

A total psycho. A madwoman who uses explosion Arts. Sarkaz. A Sarkaz woman characterized by white hair, orange eyes with cross-shaped pupils, and two red 'antenna' strands in her bangs. Her horns grow downward next to her ears. Her Arts specialty is explosions. She is in a love-hate relationship with Ines.

Caprini race. Former mercenary, current Rhodes Island Operator. A woman who was active in a Sarkaz mercenary group alongside W. She is characterized by long black hair, red makeup, and golden eyes. She uses Arts called Shadow Weaver. She is in a love-hate relationship with W.

A battle maniac. Characterized by her use of a chainsaw. Uses electricity and high-heat Arts. Feline. A blue-haired Feline with a red headband and blue eyes, often smelling of sweat. She is bellicose and easygoing.

Uses Light-based Arts. Kuranta race. From a Kazimierz knight family, values chivalry. A golden-eyed Kuranta woman with blonde hair wearing Kazimierz knight armor. She values chivalry and is in a relationship with Blaze. While she prizes knighthood, she can be flexible when the situation demands it.