How to be a very casual, straightforward and good-natured girl?

Character is a habit formed from childhood. Is it necessary to change yourself for the sake of other people's opinions? I think it's good to be myself. Just be tactful and sophisticated. Don't say what you think. Before you do something, think about whether the consequences will have any impact. Entering the society, people will not be as simple as their classmates. So you should know that girls, especially, are easy to suffer before you leave society. Watch out for dikes everywhere.