Why was clemency trending last week?
1917, "outward or social personality," a Jungian psychology term, from Latin persona "person" (see person). Used earlier (1909) by Ezra Pound in the sense "literary character representing voice of the author." Persona grata is Late Latin, literally "an acceptable person," originally applied to diplomatic representatives acceptable to the governments to which they were sent; hence also persona non grata (plural personæ non gratæ).
persona per·so·na (pər-sō'nə)
n. pl. per·so·nas or per·so·nae (-nē)
The role that one assumes or displays in public or society; one's public image or personality, as distinguished from the inner self.
A person who is no longer favored or welcome: “After my angry words with the manager, I am persona non grata at the video store.” From Latin, meaning “an unacceptable person.”