Board Thread:Naruto Discussions/@comment-1512913-20160606161440/@comment-3568954-20160615132534

Elveonora not every nation with royalty have kings and queens. only kingdoms have kings the otsutsuki clan could be a principality(or princedom) which is a monarchical feudatory or a sovereign state, ruled or reigned over by a monarch with the title of prince or by a monarch with another title within the generic use of the term prince.

an example of principalities on earth Monaco which is ruled by Albert II, Prince of Monaco(his father was the last prince of Monaco) Andorra which is ruled by co princes archbishop Joan Enric Vives Sicília and François Gérard Georges Nicolas Hollande Liechtenstein which is ruled by Hans-Adam II, Prince of Liechtenstein

all of these nations are ruled by a prince not a king or queen in all of these nations if a female is heir apparent she would be called Princess upon gaining the throan