My experience was a friend so slightly different in the fact I am less close than a family member so I guess experienced less of the nastiness. And it was easy to escape.
The main trait really is she only ever spoke about herself, she had 3 topics of conversation:
- how wonderful am i
- the compliments people have given me
- poor me (to trigger a compliment or some attention)
Sometimes there would be a 4th topic which would be how awful others were who had wronged her. This would be very extreme, so if someone did something minor they would be a horrible person and descriptions could get quite violent. Also if someone didn't give her enough attention they would sit in this category.
Her self esteem was very fragile I guess, so she built up in her head this image of her being beautiful, thin, clever, popular, the best, she would often talk about this. And then when she saw a photo of herself or didn't do something right this image was shattered and she couldn't cope. There would be tears, screaming, threats of suicide, this could be from the most basic of things like a boy turning her down or someone going for tea with another friend. She would also spend a lot of time talking about her appearance because she wanted to be stunning and have every boy fancy her.
We would genuinely have whole conversations about the compliments people had given her over the years, and conversations about how her mum loved her best how her brother was okay but not as special as her. I think her mum was also a narcissist.
She would start off as your best friend, excessively friendly but then ditch you when she felt that she was higher on the social ladder than you. Some people she would suck up to for years because she felt they were more popular or something but some people she would ditch if she felt they were advantageous. I was advantageous to her for a long time but then wasn't so I was ditched.
It's quite difficult to describe because actually she hated herself, really truelly hated herself. I've never met anyone who hated themselves as much as she did, and she gave off a performance of lpw self esteem but i think this was all so we would praise her and at the same time loved herself? Everything was about her, she loved herself massively I guess until something went wrong and then she would hate herself, I think she hated herself because she didn't live up to idea of her being fantastic.