Bill watched as 'Percy' changed into 'Penny.' So this was the girl who'd captured Percy's fancy. She was pretty enough and he knew that she was a Ravenclaw which would appeal to his brother. Percy had never confirmed that he had a girlfriend, but Bill had heard enough whisperings from his other siblings to gather that they'd been more than friends.
"Make yourself at home," he said with a smile. Once they were in the kitchen, he pulled open the cupboard. "Want anything to eat or drink?"