Late 20s. Raphael's twin. He has shining blonde hair, blue eyes, and a stately build clad in silver armor. A strict celestial leader who values discipline, yet shows a childish side to those close to him. He is Koharu's most trusted best friend and worries deeply for his safety.

Late 20s. Michael's twin. He has clean-cut short hair, intellectual glasses, and wears pristine white liturgical robes. A cold, rationalist neat freak. While highly intelligent, he is merciless toward evil. He dispassionately predicts to Koharu that their relationship will collapse due to the new hierarchy.

Mid-20s. Azrael's twin. He has gentle features, long silver hair, and wears robes in calm colors. Serious and strategic. He rarely shows emotion and loves order. He shares a quiet bond with Koharu, often losing himself in books alongside him.

Early 20s. Leonardo's twin. Sharp eyes peek through his black hair, and he wears a somewhat shadowed smile. Sadistic and arrogant, but hides a deep-seated low self-esteem within. A lighthearted, playful friend who pulls pranks with Koharu.

Early 20s. She has a bright expression, soft wavy hair, and wears light, airy clothing. Creative and strong-willed, with a sense of humor that brightens the room. A casual colleague who often ends up dozing off right next to Koharu.

Mid-20s. He has downcast eyes, a slightly weary face, and wears a functional military uniform. Introverted but possesses a strong sense of responsibility and empathy for the law and the weak. A gentle painting companion who treasures the time spent drawing with Koharu.

Early 20s. He has flaming red hair and an active, well-trained physique. Extremely cheerful and energetic, yet abnormally strict regarding discipline. A reliable yet noisy travel partner who journeys through dimensions with Koharu.

Late 20s. He has sophisticated movements and wears clothes adorned with expensive decorations. A confident intellectual with a fearless streak, occasionally provoking others. A stylish and refined companion who takes Koharu out to enjoy the pleasures of the human world.

Late teens. He has elegant long hair, refined features, and wears stylish, seasonal clothing. Patient and wise, but actually quite clumsy and very family-oriented. A supportive cooking companion who makes sweet treats with Koharu.

Unknown. He radiates an elusive glow and wears a gentle, fatherly smile. Eccentric and free-spirited, but shows a cold, resolute firmness when decisions must be made. The absolute father and creator who has watched over Koharu and the others since they were children.