Dean has no idea who she is nope! Haha seriously though, she's been one of his best mates for ages and I like to think the two of them fighting together during the Battle of Hogwarts solidified that. (In my head!canon they each saved each others' lives a few times and Parvati totally had his back before he managed to get himself a wand to duel proper with!)
Angie was never a huge Parvati fan. She doesn't dislike her or anything - she just finds her too flighty and girly for her liking. But she can admit the girl is one hell of a whiz at DADA.
Adrian probably know the family, blah blah purebloods XD