Klaus wasn't surprised at being recognized, he'd been infamous for a thousand years. But he was also fairly certain that this was the girl living with his sister. It didn't bother him that she had a roommate - it wasn't safe for a girl to live alone, in his slightly old-fashioned mind.
"Without even saying hello?" His voice was pleasant enough on the surface, but there was something malevolent underneath it, which was what usually happened when Klaus spoke. "Do stay for a while." He wasn't trying to compel her, although it wasn't off the table and he'd do it if she was difficult. "Tell me about my brother and sister. Show me your..." he hesitated before using the word. 'Art."