Thanks for
@reica for all of his contribution.
About the manga :
Oh wow wow wow wow
Chill up buddy. Don't justify her as bitch, with your short temper.
I think it's a common occurence for teen. Her rebelious phase is like this must be comes from her childhood where she was pampered and doted too much.
Every teens who were pampered as "rich prince/ss". Always having big pride and want to keep their attention as King / Queen. You will see this in real life.
She just need to be revamped her society awareness.