Inspector Jūzō Megure is a prominent figure in the case depicted in the film, serving as the commanding officer from the Tokyo Metropolitan Police Department. His background is that of a seasoned and experienced police inspector, holding a high rank within the First Investigative Division. He is a man of solid build, easily recognized by his signature fedora and beige trench coat, which he almost always wears while on duty. The hat is a permanent fixture, worn to conceal a scar on his head, a physical reminder of a past case that was instrumental in his personal life, as it is during that incident that he met his future wife, Midori.

In terms of personality, Megure is defined by his strong sense of duty, seriousness about police work, and a deep-seated commitment to justice. He is a straightforward officer who can sometimes jump to initial conclusions but always upholds the principle of prioritizing human life above all else. While he is a strict superior, he also possesses a degree of warmth and can be surprisingly lenient with children, though he will firmly scold them if they place themselves in dangerous situations. Despite his authority, he is not a deductive genius like some of the civilians he encounters, but his years on the force have granted him a wealth of practical experience.

In the film Quarter of Silence, Megure's primary motivation is to ensure public safety and prevent a potential catastrophe. The story begins with the governor of Tokyo receiving a threatening letter before the opening of a new metro line, the Tōtō Line. As the head of the investigation, Inspector Megure is responsible for orchestrating the police presence and security measures during the opening ceremony. He is seen directing his subordinates, including officers Takagi and Satō, as they monitor the situation. His role is that of the official law enforcement presence on the ground, coordinating the response to the crisis. When Conan Edogawa discovers explosives planted in a tunnel along the railway, it is Inspector Megure who receives the warning, alerted via a phone call from the voice of Shinichi Kudo. This puts him at the center of the urgent effort to halt the train and avert the initial bombing, showcasing his function as the link between the amateur detectives' discoveries and official police action.

His key relationships are clearly on display. He works closely with his direct subordinates, particularly Wataru Takagi and Miwako Satō, treating them with a mixture of professional expectation and paternal concern. He also frequently interacts with Kogoro Mouri, a former colleague from his days in the district police. While Megure does not hold Kogoro in particularly high esteem due to his past behavior and often calls him a jinx because murders seem to follow him, he has come to reluctantly accept the "Sleeping Kogoro's" sudden bursts of deductive brilliance, even if he is impatient with the theatrics. His relationship with Conan Edogawa is one of polite tolerance; he generally sees the child as a curious nuisance who should not be interfering in police business, unaware that Conan is the true mind behind many of the cases he closes, including the call that warns him of the bomb.

The film does not serve as a major point of personal development for Megure, but instead reinforces his established character. He remains the steadfast, reliable, and sometimes technologically flummoxed (as he is known to struggle with modern gadgets) chief who trusts his instincts and his team. His notable abilities lie in his leadership and his vast experience in managing crime scenes and coordinating large-scale investigations. While he may not possess the hyper-observant skills of a Conan or a Shinichi, he is a capable officer who can grasp the basic elements of a case and follow complex logic once it is explained to him, allowing the more unorthodox detectives to do their work within the framework of his official investigation.