Faeries didn't really seem to be too bad to Yukari, but Chie's reaction to her question makes her pause before saying that. Which was a good thing, because then it let her actually think about it a bit more, and remember some of the more unpleasant details that came up in regards to them.

"Well, that definitely doesn't sound anything remotely good," she said, almost a bit unnecessarily. "I'm guessing that they probably did a little more than just pulling pranks on you and whoever else was there, didn't they?"