Say, just a thought I had: what if instead of Berkut being the nephew of Rudolf, he's a self-made man of sorts? Born to a poor family, climbed the ranks of the Rigellian army though sheer strength and force of will, and eventually was name successor of Rigel due to his accomplishments and because Rudolf had no heirs (that the public knew about). He completely subscribes to the Rigellian philosophy of might makes right, hardness breeds excellence, etc, and is a very proud individual. Eventually, when Alm was revealed as the prince of Rigel, it completely drove him off the deep end, not only because some random upstart from some backwater stole the throne from under him, but it completely went against Rigellian values. Here he was, born in the slums, and clawed his way to the top through sheer determination and strength, and here this guy comes by and renders all of his achievements pointless because Alm was born to the right father. Berkut is not a happy camper.
Thoughts?