Live action TV
Description
Minamoto no Hiromasa is a central figure in the Onmyoji anime, a court noble and the grandson of Emperor Daigo. He is a well-regarded member of the imperial court and a gifted musician, known especially for his mastery of the flute. His background as a high-ranking nobleman grants him access to the inner circles of Heian-kyo, but his genuine curiosity and open-hearted nature lead him beyond the confines of court life.

Hiromasa is defined by his emotional warmth and unwavering belief in the goodness of people. Unlike the more detached and calculating onmyoji Abe no Seimei, Hiromasa responds to supernatural threats and personal conflicts with empathy and a desire to understand rather than condemn. This trusting disposition often makes him seem naive, especially to Seimei, who regularly points out his lack of knowledge about demons and curses. However, Hiromasa's moral clarity and human decency serve as a grounding counterbalance to Seimei's cold pragmatism. When Seimei performs an exorcism on Tadami, Hiromasa is angered by what he perceives as callousness; later he apologizes, and Seimei admits that Hiromasa's critique held a grain of truth. This dynamic shows Hiromasa's role as a moral compass.

His motivations are rooted in compassion and loyalty. He wants to help those in distress, whether they are fellow nobles or commoners, and he seeks to resolve problems through dialogue and trust rather than supernatural force. This idealism is tested throughout the story, but it never fully breaks; even after being betrayed or harmed, he attempts to appeal to the better nature of his adversaries.

In the story, Hiromasa acts as Seimei's partner in investigating demonic disturbances in the capital. His noble status gives him access to courtly affairs, while his personal connections—such as his mentorship under Lord Atsumi—draw him into the central conflicts. He is the one who first reaches out to Seimei despite the rumors surrounding the onmyoji, and their partnership grows into a deep friendship. Hiromasa is instrumental in the emotional and sometimes sacrificial acts that drive the plot forward.

The most significant relationship is with Seimei. Seimei often keeps an emotional distance, even avoiding using Hiromasa's name, which Hiromasa calls out as a deliberate tactic. Despite this, Hiromasa remains devoted. When Seimei is gravely wounded by a sekisanko, Hiromasa offers to give up his own talent for playing the flute in exchange for Seimei's life. This willingness to sacrifice his greatest gift demonstrates the depth of his commitment. Another key relationship is with Lord Atsumi, Hiromasa's mentor in flute playing. Atsumi becomes jealous of Hiromasa's pure nature and turns into a demon; Hiromasa's trust in Atsumi leads to his own death. Even after being resurrected, Hiromasa tries to reason with Atsumi rather than destroy him.

Hiromasa undergoes significant development. His initial innocence is challenged by the harsh realities of curses and demonic possession, yet he does not become cynical. His death and subsequent resurrection—a ritual performed by Seimei that costs the immortal Aone her life—deepen his understanding of sacrifice and the weight of the supernatural world. He grows more direct and able to stand firm, but retains his core empathy.

Notable abilities include his extraordinary skill as a flutist, which is not just artistic but also tied to his spiritual presence. His playing moves others emotionally and, in critical moments, serves as a comforting or rallying force. He is also brave in the face of danger, willing to confront demons despite lacking Seimei's magical training. While not a combat specialist, his nobility, courage, and musical talent make him an indispensable partner in the battle against the capital's dark forces.