"Heiji Hattori is a prominent character in the Japanese manga series, ""Hidden Player."" Heiji is an 18-year-old high school student who lives in Osaka, Japan. He is a skilled detective who often helps his friend and rival, Detective Conan, solve difficult cases.

Heiji is quite popular among his peers and is known for his charming personality and sharp wit. He has a strong sense of justice and will not hesitate to use force to protect those in need. He is also a skilled martial artist, which makes him a formidable opponent in any battle.

Heiji is known for his distinctive Kansai dialect, which sets him apart from the other characters in the series. He often uses this dialect to add humor or emphasis to his words, which makes him quite popular with the readers.

Despite his strong personality, Heiji has a softer side, which he often shows to his childhood friend, Kazuha Toyama. He has deep feelings for her and will stop at nothing to protect her.

In the manga series, Heiji is introduced as a new character who comes to the aid of Conan. He quickly becomes a close friend and ally, often working together with him to solve cases. Heiji's role grows over time, and he becomes an important member of the investigative team.

Overall, Heiji Hattori is a unique and beloved character in the ""Hidden Player"" series. His distinctive personality, strong sense of justice, and skilled detective work make him a fan favorite among manga readers."