As I said before, Charlotte spreads inaccurate information about what people have said, which affects other people's opinions. For that reason I don't like her and think she is dangerous. I have a thing about people who go round telling lies about others, whether deliberate or not.
In this instance she caused Harry to turn on Paul which is not actually a bad thing because they were both traitors, but she didn't know that. She is a very inaccurate source of information, but people don't realise that and probably believe her.