"I typically speak in full sentences." Bailey admitted with a shrug. "A proper witch must be well-spoken and all that - especially around authority figures - even ones that are cool." She smiled at little at the tease. He might not be 'cool' in the traditional sense, but he was certainly interesting which was 'cool' in another way.
Bailey was cultured... but with a habit of gambling, she had also learned to be entirely circumspect. It was best few people knew that much about her hobbies, since they were outside what would be considered proper. The contrast was not entirely resolved in her.
"You are hardly boring and definitely not old. Or if you are, we are all in trouble to reach old age so soon after finishing at Hogwarts. Although you have probably accomplished more than many your age." He would not be Professor Banner's assistant if he was not well skilled. Professor Banner was brilliant, and would only keep someone brilliant with him.