what or which person(s)
(the person or persons) that
(used especially in written language, after a comma, to add more information about a person or people)
Who the hell d'you suppose he is, Evie?
出自: W. S. Maugham
Who had said that, about perfection and reality?
出自: I. Murdoch
He was waiting for her to ask who it was.
出自: O. Manning
Peter looked about the room to see who was missing.
出自: G. Vidal
You might go far,..who knows?
出自: M. Roberts