I was talking to DudebladeX on twitter about this match-up and this idea came into my head.
Hubert and Ferdinand were sitting at a table, "That's why I need those wyvern riders by the beach by the end of the month."
"Consider it done."
Ferdinand walked off as Hubert took a sip of his coffee, "I guess I should report this to Emperor-"
Kylo Ren burst through the door with his lightsaber out, "EDELGARD!"
Hubert groaned as he put his head in his hand, "Not this again."
Kylo pointed his lightsaber at Hubert, "Glorified pet, fetch your master so that I may speak with her!"
Hubert stood up and composed himself, "I've told you this before and I will tell you again. Emperor Edelgard is incredibly busy with her obligations as Emperor. Please leave and return at a later date."
'Preferably never."
"Hey. I can hear your thoughts!"
"Then please know that I just want you to leave-"
"Never! I will find that broken waste you call an Emperor and I will claim her Empire-"
Kylo was cut off by Hubert grabbing him by the neck, "Now you listen to me and listen to me carefully. Lady Edelgard is working for her dream of a better world and I am working to help her achieve that goal."
Hubert threw Kylo at a table, "And I will not allow all that to be ruined by a petulant, sniveling manchild who becomes erect at the thought of his grandfather!"
Kylo was silent for a moment and started crying, "Why?"
Hubert groaned as he was about to walk out the door, "A guard will see you out."
Kylo stood up, "Oh, I don't think so."
He threw his lightsaber at Hubert with the intent of cutting his head off, but he grabbed the saber's hilt and crushed it, "Oh crap."
With a snap of Hubert's fingers, a group of guards surrounded Kylo with spear pointed at him, "Like I said, the guards will escort you out."
As the guards chased after Kylo away, Hubert took a sip of his coffee, "Nothing but the best for Emperor Edelgard. Is that so much to ask for?"