Funny enough, the person I knew who was similar to her was kinda someone I dated. Basically, we met and she didn't want to go on a date first, she was slightly older than me (I was 20, she was 24) but we had a couple of mutual friends so we hang out together a lot and well, he had like 3 dates together. I liked her a lot (can't say I loved her because it didn't reach that point yet) but basically life has other plans and these three dates are both sweet and sad memories at the same time. I miss her a lot, I'm sure we could have at least been real good friends.
The banter between the MC and Aunt Amy really looks like her personality dans how she was teasing our group of friends by giving us shit all the time. Always smiling and funny. She was bitchy but in the fun sense of the word.