The man could have legitimately been King Arthur and went with Charles III.
]]>In any case, the final option (no head of state) is very close to the way Japan currently works.
https://japan.kantei.go.jp/constitution_and_government_of_japan/constitution_e.html
Yes, Japan has an "emperor" but the current constitution does not give him any powers whatsoever and he is emphatically NOT the head of state. In fact, there is no head of state!
While the emperor does have a ritualistic role in some government proceedings, such as appointing the PM, he has absolutely no discretion and arguably no personal freedom of any kind, because he is not legally a citizen and his actions are massively constrained by the Constitution. In fact, the emperor has so little freedom that when the previous one wanted to abdicate there was no consensus that he had any inherent right to do so, and parliament passed a bill giving him permission to do so!
While the emperor, as "the symbol of the State and of the unity of the People" does engage in some of the same tasks as a proper Head of State, he really is just the ultimate version of a cosplay dynasty: all pomp and no power.
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