They're greatness, yes
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Fantasy world, lots of monsters and races and a pantheon and the whatnots. Medieval-esque setting.
Basically though-
A very corrupt empire gets its emperor killed by a random ass teenager. Now, the teenager is the emperor and is basically completely rebranding the empire. Nobles are being killed and replaced, laws are in question and changing, and there's just a ton going on.
Of course, the characters would be the new emperor, new advisors/guards/nobles, and ambassadors from other nations.
This is a very, uh, quick summarization of it but yeah.