Henry noticed the haunted look and the more quiet tone and put two and two together. While he'd never had a responsibility or "sacred duty", he was the type to always feel responsible for, well, everything. He understood how she'd feel because it was how he'd feel in the same situation. "Hey," he started softly, and reached across the table to place a comforting hand on her shoulder. "Nobody expects you to be perfect. Even Superman isn't perfect. You did the best you could, and that's all anyone can ask for."
He pondered that for a few moments, his brow creasing in thought. "...Y'know, I bet a Range Rover doing eighty could turn their smiles into frowns." He'd never suggest that for stopping a human, but a demon that feasts on children...well, he just didn't see a moral issue in hitting something like that with some good ol' vehicular manslaughter.