As soon as I was typing 'now for all the plots' I was like 'oh crap, there won't be much with her being so much older than most'. She's in that awkward spot where she's older than most but not quite in the age range of the Marauders and co.
The only stretch I can think of at all for possibly knowing her is maaaaaybe Percy from his previous work and if she asked him for a quote or something relating to some Quidditch matter. But yeah maybe a bit of a stretch.