Adriana has always been a strong candidate for the throne in Arial mind. But, there is always a worry in Arial mind that the throe is not something that his sister wanted.
But as for her capability. It might not be tested fully, but Arial had faith in his sister.
So, he is not worried that the factions would be able to manipulate his sister. However, as for his daughter? She is too young to know the game the high lords play.
She is not a chatur player. She is the chatur pieces. And the same could be said about the Bonaparte family. They are also just a chatur pieces of the chatur players that hides inside the darkness
But just because they are manipulated, does not mean that they bear no fault in this matter. If what the report said is true, then they are the impetus for the current crisis gripping the Empire.