"You've made a good choice," Hermione gave confirmation to the young woman's reasoning. "From what I can tell most of the patron's here are fairly easy going." She didn't necessarily know everyone who came in, but she did know Seamus well enough to assert that he wouldn't take too kindly to unnecessary rudeness and she didn't see any reason for a simple sketch artist to endure such treatment.
"I'm Hermione Granger, by the way," she introduced herself. "Who might you be?" she recognized some of the other woman's features which told her that she'd likely gone to Hogwarts. However, she didn't remember her specifically.