Minoru Kaigamori works as a manga editor at Shueisha, specifically assigned to manage the artist Rohan Kishibe. In 2006, during his first year at the company, he is 23 years old, married, and without children. He possesses an average build and a slightly chubby face with small eyes. His long sideburns are stylized, pointing towards his mouth. Kaigamori typically wears a long-sleeved coat and pants featuring a crosshatch pattern, complete with a wide upturned collar and light frilled trims. He accessorizes with a beret decorated with small circular beads and a watch on his left wrist. His color scheme differs between depictions: manga illustrations show blue clothes with a white collar and trims, while the OVA adaptation gives him a bordeaux and white top, a blue beret with gray studs, and khaki pants. Personally courteous, Kaigamori nonetheless finds interactions with the demanding Rohan challenging. His knowledge outside manga proves limited, exemplified when he mistakes an art book on Nicolas de Staël for material about a new music band, surprising Rohan. He tends to avoid confrontation; when Rohan reveals going bankrupt to research a yokai legend, Kaigamori silently averts his gaze, quietly questioning Rohan's sanity while maintaining professional decorum. His primary narrative role occurs in "Mutsu-kabe Hill." Arriving six minutes early for a meeting about an advance payment—an act Rohan considers rude—Kaigamori listens as Rohan explains his financial ruin resulted from purchasing six mountains to investigate a supernatural legend, causing land values to plummet. Kaigamori discreetly doubts Rohan's mental state but remains silent as Rohan asserts his research succeeded. He also intervenes when others approach Rohan for autographs, though Rohan had already signed. This story was adapted into an OVA where Kaigamori’s role remains consistent. In the novel "Yuyanagidai," Kaigamori contacts Rohan during the artist's investigation of supernatural events in a public park. He corrects a manuscript deadline error—originally stated as due the next month, it is actually due in five days. Unfazed, Rohan claims he can complete it in three days and instructs Kaigamori to research past fatal accidents in the area. Later, after Rohan confronts a supernatural entity, Kaigamori calls back, inadvertently triggering the entity’s reappearance. Rohan then directs him to call multiple ambulances to the foot of Yuyanagidai’s hills. The novel "Okamisama" includes potential appearances by an editor who persuades Rohan to participate in fan events at Setagaya Art Museum and declines Rohan’s request for a manuscript advance. After supernatural events hospitalize Rohan, this causes significant trouble for his editor. These events are noted as non-canonical, deriving from sources not authored by Hirohiko Araki.