I think the little child-creature was supposed to represent the part of Voldemort's sould that had been put into Harry when he had tried to kill Harry the first time... the last Horcrux.
I think the little child-creature was supposed to represent the part of Voldemort's sould that had been put into Harry when he had tried to kill Harry the first time... the last Horcrux.That's exactly what I thought! So that's the part of Harry that died, but he was able to return and stay with his friends, because his love for them was so great that he was willing to die for them.