Saeril, in the distance, in front of the crowd, was devastated at hearing this. This wasn't right, and even she knew about that. That mountain will become Thorin's undoing, as well as the horrid fate for Laketown. Taking one long glance at Kili, she looked down and shook her head in devastation before walking off into the crowd. 

The next morning, as the company was getting ready to leave for the Lonely Mountain on a barge, they had the weapons provided as they loaded their supplies, along with armor. 

Saeril decided she wasn't going; for the sake of the townspeople, she wasn't going. She would rather die with them, rather than see it crumble from a mountaintop. For the brothers, why was there no shame within them to see it happen? This wasn't how she wanted it to be. Not for her, not for them. For her to believe that this will be her last glance to see them, she sat about a foot away from them on a step of the pier, and watched them with hurt, and her hood up.