Rern was a 24th century Klingon individual, an officer in the Klingon Empire's Defense Force military. In the 2370s decade, Rern's specialty was as a starship engineer, and by the year 2379, Rern was serving as a ship chief engineer. (TOS video game: Starfleet Command) No history or fate is established for this character as its name was randomly selected for a engineer by the game software.