I think that Miss Caroline is a villain. The writer stated that "Miss Caroline told me to tell my father not to teach me any more, as it would interfere with my reading." She was unhappy that Scout knew how to read, hence she forced her to tell Atticus to stop teaching her to read. This shows that Miss Caroline was very stubborn and only wanted Scout to learn her way of teaching, inferring that Atticus' way of teaching Scout how to read was incorrect. Since Miss Caroline thinks that everything Scout does is not in her favour, she is a villain.