Yuki, a nekomata—a supernatural feline entity distinguished by two tails and piercing blue eyes—takes the form of an elegant white cat. Bound by an ancestral pact with the Miyako family, he devoted centuries to guarding their heirloom storehouse until young Arata Miyako’s compassionate reassurance freed him from this solitary duty, altering his destiny.

Throughout Arata’s youth, Yuki served as both protector and devoted companion, their bond deepening into adulthood. He frequently expresses affection through playful physicality, such as tackling Arata in exuberant embraces. Yuki’s role expands alongside the Nocturnal Community Relations Division, where he aids in supernatural investigations, including a notable case involving an amnesiac entity.

His actions balance unwavering loyalty to the Miyako lineage with pragmatic adaptability, navigating modern paranormal challenges. Rooted in ancient agreements tied to the Abe no Seimei lineage, Yuki’s evolution from isolated guardian to active collaborator highlights his commitment to bridging human and supernatural realms, seamlessly merging historical obligations with contemporary relational diplomacy.