(Kinda a pun, since it's meant to mean "Persona" but could also be used as "Persona, Person B, Person C" instead of "Alice, Bob, Charlie".)
Alan Cooper design thinking tool
similar to User Scenarios, Target Customer Characterization - focused on fleshing out Context of a user to identify Compelling needs.
need at least 1 per Market Segment?
Don Norman on AdHoc Persona-s