Definition by Marriam-Webster

1 : a character assumed by an author in a written work
2 a plural personas [New Latin, from Latin] : an individual’s social facade or front that especially in the analytic psychology of C. G. Jung reflects the role in life the individual is playing — compare anima
   b : the personality that a person (as an actor or politician) projects in public : image
3 plural personae : a character in a fictional presentation (as a novel or play) —usually used in plural <comic personae>