6. Then what are we? What could we possibly be?
Every companion has a moment when they confront the fact that the Doctors age and time-travel has rendered him very inhuman. The Doctor doesnt deal with death or life in the same way we do. "Everybody knows that everybody dies, but nobody knows it like him. They all have to learn that they themselves are temporary in his life, and that everything ends. The Doctor avoids this confrontation because, as River Song once said, the Doctor will never truly accept that everything ends. The Doctor lives in the moment with the person who is before him, with the mystery that is people. Clara comes to this understanding faster than perhaps any companion since Rose (who had similar conversations on her first trip with Nine). She has this confrontation so early because she forces it, because when the Doctor gets uncomfortable or tries to walk away she follows him and keeps asking questions. Clara isnt a person whos willing to let the Doctor get away with his aloofness, and shes not willing to accept an unanswered question.