Kō, a civet cat with animal ears, a tail, and sharp teeth, stands at 153 centimeters as the shortest among his peers, yet serves as a steadfast older brother figure in his rural forest community. Though a reliable mediator, he masks difficulty in expressing his true emotions beneath a composed demeanor. Tasked with caretaking during Nowa’s hibernation, he ensures Airi’s well-being with pragmatic advice, urging vaccination and candid communication between Airi and Nowa as their relationship evolves. His solutions often lean practical, delivered with occasional bluntness or dry wit.

A complex bond ties him to Watari, a raven whose quiet support contrasts Kō’s guarded nature. While he deflects personal discussions—such as insisting Airi keep their talks on intimacy private—his internal tensions simmer beneath the surface. Later, he aids protagonists in adapting to city life, temporarily managing a bakery and navigating the group’s interpersonal struggles.

Subtle growth emerges as Kō begins acknowledging the need to tailor relationships to individual needs, balancing his community-first mindset with quiet gestures of shelter and conflict resolution. Despite his self-assured front, unspoken yearnings for deeper connection linger in fleeting moments, hinting at emotions he still hesitates to voice.