Bella kept a smile on her face until he had turned back around, then she merely raised an eyebrow. She knew she wasn't imagining it. Plenty of people had been frightened of being around her often enough for her to recognize it. He was scared of her. The thought brought a more sincere smile to her face by the time he had turned back around.
She put the sickles on the counter next to the potion. "Thank you very much, Mr...?" She raised her eyebrows, obviously expecting him to supply his surname.