Xander is engaged to Anya Jenkins (Emma Caulfield), a former vengeance demon who has become human. They have struggled with disclosing their engagement to the rest of the group and individually doubt their impending marriage. Buffy died at the end of the fifth season ("The Gift"), sacrificing herself in place of her younger sister Dawn (Michelle Trachtenberg) in order to save the world. In the first episode of the sixth season, Willow, believing Buffy to be in Hell, used magic to bring her back from the grave. Buffy was in fact at peace, in what she thinks was heaven, but she has kept this a secret from her friends. Since her resurrection, Buffy has been lost and without inspiration to perform her duties as a Slayer. Willow is romantically involved with Tara Maclay (Amber Benson), a powerful but ethical witch. Tara has previously expressed concern at Willow's use of her emergent magical powers for trivial or personal matters. In the preceding episode ("All the Way"), Willow cast a spell to make Tara forget an argument about her abuse of magic. In the same episode, Dawn, who has been stealing from stores, including Anya's magic shop, lies to Buffy and goes on a clandestine and almost deadly date. Left to take care of Dawn after the death of their mother Joyce Summers (Kristine Sutherland) in the fifth season ("The Body"), Buffy has come to depend more heavily on Giles. Following Dawn's date, Buffy asks Giles to shoulder responsibility for disciplining her, much to his discomfort. Buffy's former nemesis is Spike (James Marsters), a vampire. In the fourth season The Initiative, a secret military organization whose mission is to evaluate and eliminate demonic beings, rendered Spike harmless by implanting a microchip in his head that causes him intense pain when he attacks humans. However, the chip does not affect him when he harms demons and he now often fights on Buffy's side, after at first fighting just for the pleasure of brawling. His motivations changed when, in the fifth season, Spike realized he had fallen in love with Buffy. She initially rejected him, but just before her death they had begun to form a friendship of sorts. She has been confiding in him; prior to this episode, he is the only one to whom Buffy has revealed that she was in heaven. Throughout "Buffy the Vampire Slayer", music serves as a narrative tool, integral to character development and action. The mood is set by music, characters discuss it, and writers use it to emphasize differences between generations.