[The question forces him to give pause and really think. Does he want to talk about Shinobu? His thoughts drift to her often but that doesn't mean as much as it seems. He's already accepted some things and now he just has to move past them. If he speaks of her too much... something horrible might come to pass.]

I'm hesitant too... I'm afraid, really and truly afraid of the Fog Witch's vindictiveness. How does she decide who should suffer on her little island of horrors? I imagine she brought me here to torture the ones in Morioh and vice versa. She brings people with already grave struggles and seeks to harm them further. You who has committed one murder that nearly tore your psyche apart must now commit hundreds.

If I speak of her. If I say her name out loud... I fear the Fog Witch might pluck her from Morioh and put here here. It would be of no benefit to me, with this face I do not look like the man I was pretending to be. She does not know me. And then she will have to suffer. There are few things crueler than that, and I would have to watch or perhaps keep my distance knowing she's here while the wicked people of this world spread their thoughts about me.

No. I cannot risk the witch bringing her here. And if she ever does there is no force in this world that will stop me from finding this so called God and tearing her apart.

[And that may be the most sincere Kira has been in a long long time.]