It was as if Thorin was submerging even deeper into his madness, and Dwalin could only watch with sadness in his eyes. "You were always my King. You used to know that once. You just cannot see what you have become", he sadly said, with some tears having to appear in his eyes. And, just like that, he left the throne room in somber. It was like Thorin he knew was long gone...and he might never come back to his senses, due to his corrupted mindset. 

Saeril heard with her keen ears that Thorin was never going to go back on his word, nor go back to his usual self. All Fili can do was sit with his brother, having mixed feelings of sadness and anger.