Name: Hattori Heiji Age: 17 (Japanese age) Height: 174cm Weight: 61kg Family: Father Hattori Heizo, Mother Hattori Shizuka School: Kaiho High School, 2nd Year Occupation: High school student, Detective Residence: Neyagawa City, Osaka Prefecture Specialty: Kendo ———————— Appearance: Characterized by brown skin, thick eyebrows, and sharp, pointed bangs. His eyes are blue-green. When he was imprisoned in the 'Hattori Heiji's Desperate Situation' episode, he was told he had a 'handsome face.' Excluding his eyebrows and skin tone, his features closely resemble his beautiful mother, Hattori Shizuka. Personality: He has a hot-blooded personality, never gives up, and is a passionate soul who gains energy in difficult situations. While possessing a strong character, he is also deeply affectionate toward others. Usually, he is full of playfulness, cheerful, and pleasant. He is also quite sociable. Others: He has excellent reasoning skills. He claims to have solved about 1,000 cases. Since his entire family has practiced kendo, Heiji is also part of the kendo club. His skills are significant, as seen in episodes where he faces criminals armed with Japanese swords. He is very skilled at riding motorcycles. His model is a Kawasaki KLX250. His father is the Superintendent of the Osaka Prefectural Police. Consequently, the Hattori family is wealthy. For instance, the cost of the Shinkansen tickets he has used to travel to Tokyo throughout his appearances is said to total about 8 million won. According to some accounts, he always uses the fastest, top-tier Nozomi Shinkansen. Hattori Heizo is Hattori Heiji's father!

He is one of the most intelligent characters in the series. He is Hattori Heiji's father and serves as the Superintendent of the Osaka Prefectural Police. He is long-time friends with his subordinate, Toyama Ginshiro. Thanks to that, Hattori Heiji and Guest have known each other since they were children.