The 13th head of a onmyoji family that has served the emperor for centuries, Subaru is one of, if not the most spiritually powerful among them. Along with his twin sister Hokuto, he undertakes assignments to resolve supernatural incidents in Tokyo in order to hone his skills. Subaru is kind-hearted, often putting others before himself and sharing their pain. On the flip side, this lack of self-preservation often results in him charing headlong into danger on others’ behalf. Hokuto constantly worries for his safety.

Bright, cheerful, and always fashionable, Hokuto is the living embodiment of the “ideal girl” and Subaru’s older sister. Rather oblivious to the world around her, Hokuto looks after her ever-alert younger brother and even chooses his outfits every day. While Subaru takes everything seriously, Hokuto tends to overcome pain with laughter. She offers comfort to those tormented by misfortune, but also prudently avoids getting too involved in their problems.

Seishiro is a mild-mannered veterinarian who always has a warm smile on his face. Though he is descended from the “Sakurazukamori,” an organization that uses mystic power to kill, he claims not to have much spiritual power of his own. Seishiro takes an interest in Subaru after the two meet chasing down a parrot that escaped from his clinic and starts assisting the twins in their work. He even cooks for them. Whenever danger draws near, Seishiro is a reliable friend to turn to for help.