User blog comment:B214/Question & Answers 5/@comment-67.211.8.19-20150420154745/@comment-26209278-20150420165858

I assume so, maybe they are able to change to a king once they are old enough/have the power or something, similar to how reincarnated ones can't become a king until they're high-class devils....

Not entirely sure, but i'd assume they could.