Hi Jo, I'm Joie! :) I definitely have a couple characters in my roster that would know Bree!
Marina would be the one she would interact with the most. She's been at the Dog Park almost a year now and started off as a Camp Bitch, though soon fell into ~something~ with Vic (mobdog). They just got Dog Park version of married in April, so Bree definitely would have been around for that. Marina wasn't ever really into the hierarchy that the bitches follow and is even more confused by being an old lady, so she definitely just hangs out with whoever she wants. Marina and Bree could be friends if you want? I know Cherry has already vowed to take her under her slutty wing, but Marina would give Bree pointers if she ever wanted haha.
The other who might know her is Savannah. She's the leader of the LBJ and has been to the Dog Park many times. I don't imagine they would be very close, but Savannah would definitely be nice to her if Bree was nice in return!
Isaac might know of her? He used to be Deputy Commissioner for the Capitol's DoJ and would have known about wanted criminals and such. But he left that in late January, so depending on how long she's been wanted, Isaac might not know the details?
Either way, really excited about your gal and looking forward to how you get her involved!