I'm desperate for threads with @"Benevolence Montague"- my lovely little MCPB plant breeder. How would Ursula like a plant that has opioid effects that she can sniff in her own orangery? Other good and bad effects to be determined. I would imagine that Ursula would probably use a pureblood florist where she can, even if she's as dismissive as all heck with her because ew....middle class working woman - but also no threat.
Or anyone else that would any cause to cross paths with Benevolence.

Pet and Madeleine Backus might cross some paths these days, Maddie is attending some society events and is living with a Russian family in Hogsmeade, after spending a number of months in St. Petersburg. Some Russian conversations? Also Maddie could do with someone to talk to at events - ex-prefects for life.
I'd also throw Maddie in as a friend or acquaintance of anyone who would socialise with a Half blood with an inheritance coming.

Ginevra Blackwood and Antigone were in the same year - not the same house but both UC purebloods- Vera probably attempted to drag Tig to parties and gossip and would ignore pretty much all taciturn rejections of invitations. I would imagine they ran in similar social circles as kids/young adults and Vera is willful in her own way.