Susan and Luna were both annoyed. Since it was publicly known that Luna and her were both the next in line for the Hufflepuff and Ravenclaw titles, they had been pestered with questions and some even tried to sway them to the right side. The best example was Hermione Granger and her two gorillas, John Potter and Ron Weasley. The bushy-haired girl tried to tell them that they and their families should follow the headmaster, but both declined politely not wanting to give him power. This annoyed the girl and she just said that they were foolish and started to lecture them, but the girls were able to ignore the girl.