The title of someone fit to sit upon The Ruby Throne, often being rulers of nations. The term has been uses as far back as the ancient times when the continents of Lunaria where still the single supercontinent called Tertan. Following the divide of the continent, the Throne and the Triarchs resided in the continent that later would be called Terram
During the Triarchy of Terram, Terram was under the rulership of three rotating Triarchs, making the entire continent share a imperial styled govurment
The Terror Triarch Was the last of their kind and the last to use the Ruby Throne, after their defeat the Throne was hidden away forever and the various realms of Terram become independent states.