I'm confused do they all know that she is not the actual queen?

Only blond long hair guy knows, the rest don’t

only Fley knows. Darius fell in love with her on the battfield and Midel was I guess a childhood friend that liked her when younger. But the queen has changed and since she isn't the queen now, he remembers how she use to act in the past. This is how it seems to me with this 3 chapters.