2. Ask parents or guardians for help. If your sister doesn't want to stop bullying you, or you think you can't solve this problem, you should ask your parents or guardians for help. They can take measures to help you and your sister solve this problem.
3. Don't fight back, don't retaliate. Even if you are angry or dissatisfied, don't respond to your sister with violence or bullying. This will only make the problem worse and may lead to your punishment.
As a brother, your sister may bully you just for fun. Then leave it alone. It's just a way to improve the relationship between brother and sister. Keep in touch with your sister, communicate more and get along well.