Konpoko acts as the main protagonist's primary pet companion. His physical form resembles a raccoon dog or fox more than a conventional dog, resulting in frequent mistaken identities. This visual ambiguity defines him, consistently sparking offense when he is incorrectly labeled a wild animal instead of a dog.

He comprehends human speech despite being an animal. His vocal expressions feature distinctive "Fyan Fyan" cries, especially during excitement or bids for attention. Fried bean curd stands as his strong preference, serving as a favored treat or motivator.

Konpoko initially harbors animosity toward the male childhood friend character, a reaction to that character's habit of singing songs about raccoon dogs. This dislike stems directly from the songs perpetuating the misidentification he resents. Their relationship shifts significantly when the male friend rescues the protagonist from a collapsed tunnel. Following this event, Konpoko's attitude transforms from hostility to friendship toward the previously disliked character.

A romantic subplot involves Mary, a neighboring dog who expresses affection for Konpoko. Mary's persistent fondness for him remains steady throughout his appearances. Within the household and broader narrative, Konpoko maintains his role as a supportive companion, often present during the protagonist's activities but not directly involved in the primary heroic actions. His portrayal stays consistent across all media, including the film "Hoshizora no Dancing Doll," where no additional character development or narrative changes specific to him occur beyond this established supportive role.