"Augustine regularly uses the word *persona* to denote 'what there is one of' in Christ. Although it normally renders the Greek *prosopon*, Augustine's usage doesn't carry the problematic associations which this word acquires in the East, where it tends to designation the visible and tangible unity possessed by Jesus Christ as a phenomenon in this world." pg 71
This seems to be related to [[Jenson]]'s [[dramatis personae]] concept in his concept of the [[Trinity]].