Over the time they'd been together, Luna's perceptiveness had grown even more keen when it came to him and she could read the brief silence almost as if she could read his thoughts. Perhaps, though, it was also that her own thoughts echoed his so closely. There were so many people who should be here that wouldn't be, who were no longer with them. It made her sad to think about.
Her hand slipped smoothly into his, giving it a light squeeze, as much as she could with him holding the tray and his flute. "They're still here, love," she murmured, "so long as we keep remembering them, they're always with us." Luna truly believed that. She let that knowledge comfort her. Harry would want them to be laughing and happy and she was determined to honor his memory by giving him that.