Oh! [she smiles hesitantly, getting it] You're rather like the Adeptus Arbites!
[even though he's from the distant past, Arbites from the distant past might still be as rigid as the ones she knows, so it's best not to take chances, especially with her memories of Calpurnia fresh in her mind. She straightens up a little more]
If you don't mind my asking, Arbitor York, what are the 'united states'?