Restless then a question of young, what is that creature which groans helplessly in the chapter King's Cross?
all know that Voldemort is so that the question be rephrased as follows: that Voldemort is doing there and why has this issue?
Maybe it's easier to say because it appears in that form. This is the form that had almost fetal beginning of Goblet of Fire, when he had to rely in all respects on the help of Wormtail. It appeared again in the same manner in the final scenes of the Goblet of Fire, when Wormtail performs the spell that Voldemort returns in a body, then accompany the body that until his death.
It is therefore the only form allowed the fragment of Voldemort's soul that was left after the creation of the Horcrux. A form that would not have the strength to survive, if not supported by the Horcruxes because then existing.
Nagini, the last Horcrux, is still alive. But why Voldemort is King's Cross with Harry, if it is not dead yet?
