Welcome to our game, I'm Caleb and I have a few kids for your disposal, most of which I am almost certain Isadora will either despise or simply ignore. :)
Alastor Moody, former Head Auror thanks to a nice demotion, definitely does not trust your girl knowing this story line with her brothers. He probably kept up with her family's trials quite hard. Not to mention his affiliation with the Order, he is also a halfblood and would be quite careful around her.
Rabastan Lestrange, former Inner Circle Death Eater thanks to his idiocy, is the spare heir and knows it. Up until now, he has been an immature Death Eater that has not learned to grow up yet. But I think his last lesson will solve that problem, especially considering he lost his Inner Circle spot to Leoben Yaxley.
Arthur Weasley, so far a neutral character, lost five-year-old Percy to Fenrir Greyback, who turned him at the full moon in July. The Dark Army targeted the Burrow and the Weasleys are now living at Shell Cottage with their good friends, the Lovegoods, who also have been displaced by Greyback's crazies. Of course, you know Arthur is a blood-traitor so I sincerely doubt that they would ever have a positive conversation.
My last boy (I only play the blokes!) is a vampire with Muggle heritage. With him, I'd just suggest to stay away. ;)