I like to call all clerical figures "Father." Bishop Slattery in Tulsa said that was what he preferred.
I was in one line for three priests at the Penance Service - one of whom was the Cardinal . . . when up the aisle, late (his plane was late) comes panting the parochial vicar, doing up his collar and putting on his stole as he ran . . . and yes, when I got to the head of the line it was his turn!
He gives the most amazing penances . . . some are pretty difficult to perform . . . take days or even weeks to get done . . .