persona grata

 
Pronunciation: /pəˌsəʊnə ˈgrɑːtə, pəː-/

noun (plural personae gratae /-niː, -tiː/)

  • a person, especially a diplomat, acceptable to certain others: in my last term I became persona grata to a group of Newnham College girls

Origin:

Latin, from persona (see persona) + grata, feminine of gratus 'pleasing'