As Yun Ruoxi was the princess and the heir to the Yun nation, she was going to be the Queen in the future. Hence, she had been treated with unparalleled respect since she was young.
When they were in the palace, everyone treated Yun Ruoxi well and she probably thought that it was normal.
After coming to the xuanqing sect, Yun Ruoxi slowly grew up and understood many things.
If everyone didn't know her identity, they wouldn't fawn over her like those in the palace, nor would they treat her with respect.
She roughly understood how normal people got along.
She also knew that her senior brother did not know her identity.
However, her senior brother had always been good to her.
As she grew up, she slowly understood.
Her Imperial mother and Imperial father had also given her some advice, so she felt that she should also treat her senior brother well.