Who's body is Xavier in?

[OptimusPrimeRib]

guys,i missed that part ,i didn't see anything about xavier on the last part
what happened? how did you know he transfered his mind?

It's the scene after all the credits have rolled. Remember the body with no higher brain function from the begining of the moving. When Xavier asked his students if it would be ethical to put a father of four's mind into the body. Well the scene show Moira in the room with the body, the body removes the respirator and speaks in Xavier's voice. I don't remember what he says, something like "Hello, Moira." She gasps and says, "Charles?". That was pretty much it, but it was clearly xavier.