paragraph: I pulled out the hammer and one of the stakes. He leapt over the pews, soaring like a grasshopper, and drew a gleaming knife in midair. I dodged, but he tossed it, and I held the box in front of my face. The blade lodged in the wood, its silver point penetrating the velvet and nearly reaching my skin. My arms shook from the force of his throw. Then he landed heavy beside me and I scrambled to stand. His first move pulled out the dagger, almost wrenching my arms from their sockets as I held on to the box, and the second shattered the box with a crushing punch that sent me reeling backwards. I dropped the splinters and the broken second stake and raised my hammer, ready to drive the ash spike into his heart. Behind him, I saw Nepthys running between the pews. I braced my legs against the stone floor and he was on me. I raised the stake; he drew back the dagger for a slash that could doubtless open my neck from throat to spine. The stake went down, there was a blur, and then my hands were empty and I felt pain under my jaw. Two points of fire opened in my throat for an instant, then all went numb. Taste, hearing and touch became a single blur, and I do not know if my eyes were open. My mind began to dissipate, but then I felt the pain withdraw and a lifeless voice said, "This one's blood isn't worth drinking." Hands closed on my neck and I felt my spine crack. I must have fallen to the floor then. I could perceive Nepthys' sword flashing over me, and I heard steel crack, then bone. I thought I heard Rachel's voice blearily calling for me. Then one set of footsteps began walking toward the altar. I was content to let myself drift away, and I had almost forgotten the body lying with broken neck on the cathedral's hard tiles when I felt a warm touch on its cheek. 
question: Whose voice does the narrator hear before hearing footsteps walking toward the altar
answer: Rachel's