Yuru is a highly selfless, pragmatic, and family-oriented protagonist. Raised as a secluded mountain hunter, he is exceptionally resilient, emotionally controlled, and adaptable. He possesses an unwavering offensive mindset, refusing to run or hide from danger. While stoic and deeply rational, his core driving force is an absolute, fierce devotion to his twin sister, Asa, prioritizing her safety above his own needs.

Asa Higashimura is a resilient, composed, and strong-willed individual. Outwardly, she projects a tough, masculine, and emotionally guarded façade, showing readiness for violence against her enemies. However, this cool exterior completely crumbles around her twin brother, Yuru. She is deeply devoted to him, turning into a comical, highly emotional, and fiercely protective sister.

Gabby appears as a sweet, childish girl who loves playing her Nintendo Switch and acts like an energetic little sister. However, she has a dark, sadistic side. As a ruthless mercenary, she is completely bloodthirsty toward adults, ordering her Daemon to violently rip targets apart with a smile. Despite her terrifying cruelty, she has a strict moral code and fiercely refuses to hurt children.

Dera is a dependable, street-smart mercenary who acts as Yuru's guide to the modern world. On the surface, he is laid-back, friendly, and a bit goofy, often indulging in junk food and video games. Underneath his casual attitude lies a highly perceptive, tactical mind and a deep sense of loyalty. He is fiercely protective of Yuru, providing pragmatic advice while keeping a cool head under pressure.

Left is a deeply duty-bound, rational, and serious-minded Tsugai who stands in stark contrast to her boisterous, chaotic twin, Right. Though she projects an unexpressive, stony, and occasionally distant facade, she possesses a fierce, underlying compassion. Unbound by rigid commands, she relies on her razor-sharp combat instincts to ensure Yuru's safety.

Right—one half of the divine guardian duo—is defined by his boisterous, aggressive, and thrill-seeking nature. After serving as a stone statue for over 400 years, his personality burst forth as a passionate warrior. He is boisterous and unfiltered, constantly charging into fights with a battle-hungry smirk. Despite his blood-knight demeanor, he possesses a deep sense of justice and fierce loyalty to his master, Yuru.