Ivan Lukich Fokine is an officer serving within the Electrocrime Investigation Bureau's Investigation Support Department. He is identified as an inspector with Russian Interpol, which establishes his position within the international and law enforcement structure of the series' world. His work brings him into regular contact with the series' central characters, Echika Hieda and Harold W. Lucraft, and he becomes fast acquaintances with them as they collaborate on cases.

As a professional in the Investigation Support Department, Fokine's role is to assist the primary investigators in their duties, which involve solving complex technological crimes in a society where memory and data are deeply intertwined. Following the resolution of a significant incident known as the E case, Fokine's career progresses as he is promoted to become the head of a special investigations unit. This advancement indicates that his competence and reliability are recognized by his superiors in the aftermath of a major event. Among his personal characteristics, Fokine is notably fond of pancakes, a small detail that adds a layer of everyday humanity to his character as a law enforcement officer. In the line of duty, he is depicted carrying a standard-issue sidearm, a fictional pistol known as the Flamma 15, which is used by members of the Cybercrime Investigation Division.