Inspector Unmei functions as the police chief in the narrative, appearing in both manga and anime. His design distinctly evokes Ludwig van Beethoven, mirroring the composer's facial structure and hairstyle. As a recurring member of Osamu Tezuka's Star System, he maintains consistent traits and roles across various Tezuka stories.

Unmei exhibits dedicated professionalism in his duties, typically remaining composed during crises. His investigations frequently lead him to interact with the protagonist, especially during incidents involving the protagonist's altered form. One notable case involves him engaging in a high-speed vehicular pursuit, employing aggressive driving tactics that cause extensive property damage to road signs and other police vehicles.

His cases often involve ancient civilizations and supernatural phenomena, such as investigating mechanical guardians within underground ruins and pursuing advanced speeding vehicles connected to the protagonist's inventions. His police work also intersects with supporting characters, including gathering eyewitness testimony from a ramen shop owner during port investigations.

Throughout the series, Unmei remains an auxiliary figure focused solely on law enforcement objectives, lacking personal story development. His role consistently advances the plot through police procedural elements across multiple story arcs.