Kagezaki is a significant character in the anime Rental Magica, serving as a high-ranking representative of the magical governing body known as the Association. His appearance is notably unremarkable, with an age that is difficult to pinpoint, and he lacks any distinctive physical features, which adds to his enigmatic presence. His magical discipline is Taoism, a system that allows him to command powerful spells such as the Yu Steps, the Tongue Mantra, and the Six Ding Protective Spell.

Kagezaki holds the crucial position of an enforcer for the Association, a role that has earned him the reputation as the one who sanctions mages who break the rules. In this capacity, he often acts as a supervisor for Astral, regularly appearing to evaluate their performance or to deliver critical information. He is known for his calm, collected, and somewhat antagonistic demeanor. He often wears a confident smile and seems to derive satisfaction from keeping the members of Astral on edge, acting as a continual reminder of the authority and scrutiny they operate under.

His relationship with Astral is defined by this supervisory role. He pressures the fledgling company by threatening to revoke their registration if they fail to take on difficult missions, thereby acting as a catalyst for some of their most dangerous assignments. Despite his often obstructive and jerkish behavior, his role is not simply that of a villain. He intervenes in major magical incidents to maintain order, and he is seen heading Association forces during confrontations with rogue mages, stepping in to ensure that the situation does not spiral out of control.

One of the most defining aspects of Kagezaki is his hidden past and immense power. He is one of the original members of Astral from the era of the previous president, Itsuki's father, where he operated under the alias Kashiwabara Daisuke. This history is known to only a select few. His abilities are formidable to the point of being legendary. His Taoist magic specializes in negation, effectively returning supernatural phenomena to their natural state and thereby canceling out other spells. He is noted as the only person to have ever defeated the powerful onmyouji Nekoyashiki Ren in single combat. In one instance of overwhelming power, he single-handedly suppressed a rampaging spiritual vein, a feat witnessed only through Itsuki's Glam Sight, which perceived a colossal hand clamping down on the chaotic energy. Because of this strength and his secretive nature, he is a profoundly mysterious existence even within the Association, with his power said to approach that of a celestial being.