Kouya Kokonoe is a supporting character in the anime My Daemon. He is a daemon user and a field operative for the Peace Organization, a group formed after a nuclear event that brought the human world and Hell into contact. Despite appearing to be of an advanced age, Kokonoe has a noticeably muscular and robust physique, with olive skin and gray hair slicked back except for a couple of stray strands.

He carries a businesslike and sometimes stern demeanor, especially in his early interactions. Initially, his outlook on daemons is practical to the point of being cold, treating his work as a matter of duty rather than empathy. His motivation stems from a professional obligation to the organization's mission, which involves managing and sometimes eliminating daemons. However, this perspective begins to shift once he crosses paths with the protagonist, Kento, and his daemon companion, Anna.

Kokonoe's role in the story becomes more prominent after he and Kento end up living together for a period, starting on a rough footing. As he witnesses Kento's unwavering dedication to Anna and to daemons in general, his rigid worldview softens. He becomes more open with his own emotions and grows more invested in his working partner, Yagi. This partnership is notable: Yagi wields a parasitic daemon named Parasa that can envelop its human host as living armor, greatly enhancing strength and other physical capabilities. Kokonoe himself is paired with a daemon called Hupy, whose specific abilities are less documented but likely serve his role within the Peace Organization.

By the end of his arc, Kokonoe transforms from a detached operative into a more emotionally available protector, capable of recognizing the bonds between humans and daemons as something more than a target to be controlled. His development is marked by a newfound warmth and a willingness to act on personal connections, especially through his partnership with Yagi and his gradual care for Kento and Anna.