Some member worlds of the Empire were ruled by kings, queens, emperors, princes, and various other types of royalty. Most of these functioned with some variation of "His/Her Majesty". Rin Sakaros permitted this, with two restrictions: off their own worlds, sub-monarchs were styled "His/Her Serene Highness" (direct address "Your Serene Highness"), and only the Sovereign of the Empire could use the added "Glorious" in her full title. Similarly, only the Sovereign and the Phoenix Prince could use "Imperial" in their styles. Rin herself also addressed any subordinate monarch by name, rather than as "Your Majesty"; even Rin's use of a title (e.g. "Queen Aria" rather than just "Aria") was considered a sign of great respect for the subordinate monarch in question.