Fili respected his uncle, but for him to disrespect one of his newest friends wasn't something he should tolerate. In a way, he was lucky, and glad to even love him, in the first place. To hear Yavanna reply back in such a sad way made his heart clench; her feelings were hurt. He looked behind him, up at her fair Elven face. The glow that he knew, one that usually came from the princess, it dimmed a little, and he figured that it was apparent by her feelings of sadness that made it turn dull. The blonde ignored Thorin, as he kept his gaze on the girl. He would do anything to see the smile come back; the one that was once there, only a few moments prior. 

As Saeril comtinued looked up, she heard the footsteps of Kili departing the scene. Just as she did, the she-elf looked back up, where she saw the glow dimming, where she heard the saddening voice of the princess. Worried, she stood up, and gracefully took flight back to the balcony where the other dwarves were. Going to where she heard those voices, Saeril landed gracefully in the walkway, and walked upon to where she saw Thorin looking at her godsons and the princess. It took her a while to process what she had happened to hear, but reluctantly walked over to Yavanna, and stood next to her, giving her a reassuring smile, only a mother would give.