โThereโs an echo of what Lily did โ a quite conscious echo of what Lily did right at the start of the story at the very end of the story. At the start of the story Lily dies to keep her son alive. At the end of the story, Harry lies, pretending to be dead on the ground and itโs a mother who saves him again because sheโs trying to get to her own son. So that was my, you know, that was closing a circle. He was saved there by Lily and heโs saved there by Narcissa.โ
โ J.K. Rowling, regarding the parallels between Lily and Narcissa