Radnor was a celestial body situated within the Mid Rim region of the galaxy, specifically along the Corellian Run trade route. Brierly Ronan, holding the rank of Colonel, entertained the idea of leaving an Agent from the Imperial Security Bureau at this location, before continuing his journey to Scarif.
The initial canonically established reference to Radnor occurred in issue number twenty-seventh of the publication Star Wars: Build the Millennium Falcon. Its genesis can be traced back to the Star Wars Legends young adult novel Jedi Quest: The Way of the Apprentice, which was published in 2002. Notably, the Star Wars Inside Intel article "Twi'lek Culture" from 2021 repurposed a visual element that had previously represented Radnor in Build the Millennium Falcon, this time to illustrate Ryloth.