It's not so much him reacting to deaths, it's him reacting to deaths that are the result of his actions, whether those deaths happen by his hand or not.
By the game. He isn't showing remorse over those deaths. In fact, he ''excuses himself'' in front of Ryoma for having spared Hinoka and her soldiers, saying all of this has been for the good of everyone.
edit: And as StrikeZero says, he faces no consequences. He's having a great time at the end when he's forgiven.