R2-C4 is a fictional astromech droid from the Star Wars universe, appearing as a small, wheeled service droid used for navigation, repairs, and technical support. Unlike human characters, it does not have a conventional personal name structure, so its designation is treated as its full name. R2-C4 serves as a background support character rather than a major plot driver, representing the practical utility and personality often given to droids in the series. It functions as part of the wider Star Wars setting's starship and maintenance culture.