
I can't see Kasia as an empress because I believe it goes against the freedom she values, so the only ending I can see that the two of them can be together is if after the fall of the emperor the third prince really does ascend to the throne. We know that he is still a child so maybe he has not yet been totally influenced by his father and in fact, with the help of the second prince, he can be a good ruler.

I'm sure her father gave her the dagger to protect herself from other people.
I believe that because of her arrest her father joined ML to overthrow the emperor and after he killed his own father he went to meet her seeking to free her. It's just sad she k*lled herself because of lack of communication.
oh...my...god. drama is coming.