This character is a daughter of an upper class family.
The upper class is the social class composed of the wealthiest members of society, who also wield the greatest political power. The upper class is generally contained within the wealthiest 1-2% of the population, and is distinguished by immense wealth (in the form of estates) which is passed from generation to generation.
This trait is about the social status of the character and does not refer to her behavior*.
*Having grown up accustomed to wealth and privilege, they have a tendency to flaunt their family wealth and status. As they are used to being waited upon by servants, they are more likely than not to order others not of the same social status as them around, even unintentionally.
Upper Class Woman