Can't die? The woman would latch onto him and... For a moment, he really does appear to be without the lines. Yet upon looking deeper, upon gazing as hard as she can and feeling a horrible burn inside of her eyes, Shiki would see a few lines along the boy's body, along with a single point in the center of his chest they all lead up to. In a blur, she'd cut into the thing without even thinking and stab right through his "Point of Death", at this point he's dead regardless of anything, even immortality can't protect from such power... And with that, she'd look at the lines across herself, gazing at them from the reflection of her blade even as she fades, but rather than simply choking, Shiki would jab her knife straight into a "Point of Death", as she dies, the woman would smile sadly as thoughts of a woman with red hair and a boy wearing glasses come to mind... Jeez, too bad that she'll never see those two again.