I agree with you- she definitely knows she’s an intelligent and attractive young woman, “my beauty you had early withstood,” and she’s proud of that fact (it can be seen in the way she talks about her mother and her younger sisters). She is so confident and fearless. But she is just too likeable a character to hold it against her- and becomes aware of her own/her family’s faults and is able to admit that- well that makes for a pretty great character.