Junichi Narutaki serves as the principal protagonist of the story, a young man whose life becomes inextricably linked to the ancient and violent curse threatening the city. His background establishes him as a student of history and the occult, as well as a descendant of the great exorcist Abe no Seimei, a lineage that places him at the center of the escalating supernatural conflict. He is initially presented as a dedicated and serious individual, but one who is also marked by a deep sense of responsibility and a burning desire to protect his city from a threat that most cannot perceive.

In terms of personality, Junichi is defined by his unwavering determination and courage in the face of terrifying forces. He is driven by a strong moral compass, compelled to act against the growing evil of Taira no Masakado’s vengeful spirit. His motivations are built upon a foundation of duty, both to his hereditary role as an onmyōji and to the living citizens of the megalopolis. This sense of purpose is intensely personal, fueled by his close relationship with Yukari Tatsumiya, whose tragic connection to the curse gives him a profound emotional stake in the conflict.

Junichi’s role in the story is that of the active hero and principal fighter against the malevolent cult seeking to resurrect Masakado’s power. While he possesses inherent spiritual abilities, he is not a master from the outset and relies heavily on the guidance and training of Kyouichi, an older and more experienced onmyōji who serves as his mentor. This key relationship is central to his development, as Kyouichi imparts crucial knowledge and techniques, preparing Junichi for the immense battles to come. Another pivotal relationship is with Yukari, whose possession and suffering become the primary catalyst for many of his most desperate actions.

Throughout the narrative, Junichi undergoes significant development, transforming from a knowledgeable student into a formidable exorcist. His journey is one of emotional and spiritual hardening, as he is forced to confront horrific realities and make terrible sacrifices. He learns to master his inherited powers, moving beyond theoretical knowledge to practical, high-stakes application in his final confrontations with the resurrected Masakado and his followers.

His notable abilities are rooted in the traditions of onmyōdō, the way of yin and yang. He is capable of performing complex esoteric rituals, including the creation and control of shikigami, or spiritual familiars, which he uses for combat and reconnaissance. His most potent power is his connection to the Gasshaku, a powerful dragon spirit that acts as his ultimate guardian and weapon. However, summoning and controlling this entity comes at a great personal risk, and mastering this force represents the peak of his development, allowing him to stand against the god-like power of his adversary.