No one in this world can show what one particular person looks like but a "caricature artist"-- someone whose sight hasn't been impaired by the desire to show, and whose ability to show hasn't been overrun by an excess of clarity. But it takes a person to see a person. A camera can't do it but a person holding a camera can, and one who can see and has the desire to show will find the lighting and the angle and the moment which distills what they see, when they see a person, into something that can be shown and kept and held. And a caricature artist, seeing the photo can boil it down further and enhance it, just as they can with anything, with a recognition of the shapes and knowledge of the meaning behind them.