In A Wrinkle in Time, Meg who is the main character of the book always develops new traits. In the beginning of the book she was the kind of character that didn't have self confidence and still doesn't. She said/told herself that she did everything wrong. She also showed that she was the kind of person that would stand up for her family. An example of where she sticks up for her family is in the beginning of the book where she describes the fight she has with these two boys that insulted her little brother Charles Wallace. She is also does not trust people that easily, she feels as if she let's them get close to her they will hurt her. When she first met Mrs. Whatsit she was thinking to herself saying why was that lady here, she was she the tramp who was stealing and she got really crazy over it.
I also noticed that she can get to a point where she will not listen to anyone else and think that her answer and her idea is the correct one. Like when Charles Wallace says something she will always contradict him or say he is wrong but she does it because she wants to protect him. These are some of the traits she develops during the book. But not only she develops traits but different feelings for the people in the book.