Some girls are too sensible since childhood. What is sensible? They dare not want anything.

You will only be sensible after a major change, which is generally a huge psychological impact of a substantive event on yourself.

Personally, I think there are mainly

First, the family has undergone major changes. It turns out that someone's family lives a happy and well-fed life. Suddenly, in unexpected troubles, their parents were injured or went to hospital or disabled or died, and they lost their family's financial resources. Parents need to be treated, and brothers and sisters need to be raised. One person needs to bear the burden of the whole family. If forced, if this person has a sense of responsibility, he will become sensible, grow up quickly and become the pillar of the family. Even if she used to be the apple of her parents' eye, even if she didn't touch the spring with her fingers, she should be strong.