Juzou Megure serves as a Police Inspector in Division 1 of the Tokyo Metropolitan Police Department, a role in which he routinely directs homicide investigations and coordinates field teams at crime scenes. He is a veteran officer of considerable experience, and his physical presence is notable for his imposing frame and thick, dark mustache. A constant feature of his appearance is his ever-present hat, which he never removes while on duty. This hat conceals a scar on his scalp, an injury he sustained early in his police career during a case that involved a serial killer targeting young women. At that time, he was assigned to protect a high school student named Midori, who had volunteered as a decoy. The assailant struck them with a vehicle, leaving Megure with his hidden scar and Midori with a visible mark on her forehead. The bond forged through this traumatic experience eventually led to their marriage. He keeps the scar hidden not necessarily from shame, but to avoid having to recount the story of how he and his wife received their matching injuries.

In terms of personality, Megure is a capable and passionate officer who demonstrates fierce protectiveness toward his subordinates, showing a particular paternal care for Miwako Sato, whose father died in the line of duty. He is prone to occasional shouting fits when frustrated and has little patience for foolishness, but his dedication to his work is absolute. His investigative methods are somewhat conservative, which can limit his ability for flexible thinking compared to the prodigious amateur detectives he often encounters. He also maintains a strong sense of justice and a zero-tolerance resolve, particularly in cases that mirror the trauma of his first investigation.

Megure’s motivations are rooted in a deep commitment to protecting others and uncovering the truth. He relies on procedure but is not inflexible; he keeps cases open until all facts are presented and allows latitude to those who can help reach a resolution, even if they are unconventional. A defining aspect of his professional life is his reliance on external investigators. He was a good friend of the famous detective novelist Yusaku Kudo and often consulted him on difficult cases. Through this relationship, he came to know and greatly respect Yusaku's son, Shinichi Kudo, whose deductions he considers invaluable. In stark contrast, he has a low regard for his former police colleague, Kogoro Mouri, whose presence Megure associates with an endless stream of murder cases, often jokingly referring to him as a bringer of death. Similarly, he tends to view Conan Edogawa and the Junior Detective League as nuisances at first, though they consistently prove helpful in solving cases.

Regarding the specific events of The Bride of Halloween, Megure's role focuses on coordinating the police response to a series of bombing incidents in Tokyo. His involvement includes overseeing a security drill for a wedding ceremony at the Shibuya Hikarie building. During this exercise, he is disguised as a priest while monitoring a staged armed intrusion scenario involving his subordinate detectives, Takagi and Sato. His leadership during this film merges stern authority with a deep concern for team safety, and he rejects hazardous tactics, such as using officers as decoys, that might put his people at risk. Though he may depend on the insights of others, his physical courage is notable, as he has demonstrated a high tolerance for pain and a willingness to put himself in harm's way, once intercepting a metal pipe meant for another person and enduring the blow without faltering. While he possesses a great deal of field experience, his primary strength lies in his ability to manage investigations, trust his team, and accept competent aid wherever it comes from in order to achieve justice.