Ezra watched her assess him, and he tried to remain still, and not back off even more. His knee jerk reaction was to distrust her, like he did everyone. It was default for him. But he didn't let that show, he just stood apart from her and kept his eyes on her.
He didn't acknowledge that she was sort of thanking him, not used to that sort of thing either. Gratitude had been something that had fallen by the wayside early in his experience. Along with oh so very much more.
When she said that she owed him one, true confusion touched his eyes and he frowned at her, wary, like he was looking for the trick. Because it had to be a trick, right? One he didn't understand, to be sure, but there had to be some catch involved. In the end he wound up shaking his head. "No," he said. "You don't. I didn't do anything."