Luna, on the other hand, hadn't been making grand plans of escape. Plans had a tendency to fail, especially when they had nothing to plan with. While she was sure something would come up, she'd found it best not to torment herself with useless ideas. She'd supplied details her friends had asked about, or pointed out flaws in particularly complicated schemes, but had contributed little of her own. She'd spent much of her time with them listening, and simply being glad to have them around.
She was also the last suspicious of the group. So she noticed what the Death Eater was saying, instead of simply that it was a Death Eater... and that he was alone. "There's no one with him, Ronald," she pointed out at his comment. "Unless they're out of sight, of course, but that isn't typically how they've come in, in the past."
She kept her own voice somewhat low, as requested, but she got to her feet, moving to the foot of the stairs and peering up at the figure. "What do you want?" she asked of the man on the stairs.