These servants are definitely going to be long-lived and non-disposable characters, that’s why the transcripts only refer to them by hair color.
Stanczia: Driver. What are you doing in your room at this hour?
Orange: S-self-isolatin’, Lady Stanczia! My work’s all taken on for the night — won’t be any loss for you.
Stanczia: You don’t look . . . unwell.
Orange: Only took mild sick, but they’re sayin’ to shut yourself away anyhow — [koff koff] So’s you don’t pass the winter fever on to someone else who might take it worse.
Stanczia: Don’t be absurd. You work for vampires. We can’t get human viruses, no matter how new this strain is.
Are you too ill to work?
Orange: N-no ma’am!
Stanczia: Then get back to it — just like our two dozen other human servants.