Saeril felt the two guards release her being, but she didn't expect Thranduil to order the girl away. The elder wanted to protest but couldn't, since it was the king's order, and that she did say she would be the only one who wanted to speak with him. Her yellow-green eyes told Yavanna that everything was going to be okay, and that she should trust her with this. 

As soon as the princess disappeared behind the closed doors, Saeril looked back to the Elvenking. "I know what you seek in that mountain", she said, taking a couple of steps forward. "White gems of pure starlight; they once belonged to a woman here; a woman I once knew, before her cold-blooded demise", she explained in emotion of shame and pain of the death of his so-called wife. 

"I know that Mirkwood forest has been another half of her, and I know how it feels", the she-elf softly said. "I won't speak of her again, if that is what you prefer, and I will take your word for it", her hands were then crossing over each other in front of her, showing that she meant no disrespect. "I can retrieve them", she spoke up after a moment of silence. "The gems of Lasgalen".