Cepheus - Narcissa's nephew she's big on family so will probably adore him. Orla is vaugely family in that Regulus is her Uncle via marriage. Does that count? Orla works for Walburga obv so there is that too. She'd probably like him honestly. Ceph was also in Jasper's year (sorry I have to torture him by calling him that) so Mafalda probably vaguely knows him. Mal is also Rodolphus's secretary so there's that too. Barty and Frank would be polite to him. Marcus totally wants to hang out and be 'friends' - he was the year below Cepheus.
Walburga - Narcissa adores her cause she adores all of her family and just wants to do good with them. Also helps to have the Queen on her side. I mean what. Orla is 'family' but she doesn't count it. She respects the Queen a lot and is everso grateful to be working for her. She's very fully behind the Queen and the Crown. She just wants to do a good job at everything. Emmeline bore her grandson so there's that. Amber works at the palace in the library.
Lena - Orla was in her year at school though a Ravenclaw. I imagine they might have gotten on well? Fabian and Barty are Aurors but in England + Scotland so IDK where she is based? Marcus would flirt
Jacen - Fabian is family adjacent! year below Mafalda at school (she was a Gamp then)