Saeril understood Kili's predicament, considering that she knew how hard it was to tell someone that they have lost another who was very dear to them. The pain of loss was very hard, and very difficult to recover from. As traumatic as the event was, it was going to be a very slow recovery. If the young Durin began to blame himself, he could suffer from survivor's guilt. If this keeps up, depression could follow. 

The elder she-elf lightly squeezed his shoulders in comfort before gently placing them at the sides of his face. "It's going to be alright", she softly told him. "Trust me. Trust [i]us[/i]", she gestured to the youngest she-elf. "The death of your brother and uncle were never in vain. Just know, that they have died to protect your homeland, your name, and your family", and those said-events were being replayed in her mind; when Fili told her to flee with Kili, her screech, up to the funeral. And, as she kept her gentle hands on his face, these events were suddenly in a vision for Kili to see. "They fought and died with honor".

As soon as the images dissapeared, Saeril used her thumbs to stroke, just below his eyes, to comfort him, and hope that her words were enough to help him, before gently enveloping him in a warm hug to ease him.