Le professeur is a character from the 1997 animated television special City Hunter: Goodbye My Sweetheart, which was released internationally under the title City Hunter: The Motion Picture. He is introduced as a wanted criminal whom inspector Saeko Nogami attempts to apprehend, but he manages to escape. He is described as a dangerous suspect who is adept at using a weapon known as the Black Talon, which is portrayed as both effective and hazardous.

Despite this initial criminal introduction, the character takes on a more unexpected and lighter role within the story. He is described as a kind of guardian angel to Ryo Saeba and his friends, watching over them at key moments. In addition to this protective side, he is also a source of humor, contributing to several hilarious gags throughout the special. This combination of roles makes him a lively and unpredictable figure who oscillates between being a threat and a comic relief character, acting as a true live wire in the narrative.

In terms of motivations and personality, the published information does not provide a detailed backstory for le professeur, nor does it outline a specific character arc or development across the special. His role is functional within the plot, serving both as a target for law enforcement and as an unexpected helper to the main cast. His key relationship is primarily with the main characters, especially Saeko Nogami, whom he evades, but he ultimately reveals a protective streak toward Ryo and his group. His most notable ability is his skill with the Black Talon weapon, as well as his knack for evading capture and his talent for creating comedic situations.