i'd love for her to have a half sister! that'd be great actually, someone she can look up to and rely on when things aren't going her way...which is majority of the time because of the quidditch fame, and more friends she can afford - some who aren't so keen in pointing her in the right direction. she's very naive because of her age, and is very nice to the point that she'd do anything for anyone she sees as a friend. you can see where all of the problems might arise due to her "pushover" personality. she just needs a female figure to help her calm down a bit, and an older sister might be able to manage that job.