It's... [Light sighs. He almost wishes Sayu had been sent home, but there are of course, slightly more selfish reasons embedded in his thinking along with the altruistic ones.] It's complicated and I don't want to have to explain this twice, so pay attention.

Sometimes the Author sends people home temporarily, but as long as the name plaque stays on their doors, they will come back. I've seen it happen several times before. It doesn't look like they have any recollection of the Manor either, when they go home. [Light still doesn't know if this is a blessing or not.]

In other words, she's more than likely safer than we are. [Especially considering just exactly who was in power back home. A pang. Light had been so damn close, that it actually hurt thinking about it, though he'd bury it under a layer of anger and external maliciousness....which is something the unexpected reddened hue of Gokudera's cheeks provides. Light knew that the two of them were talking, but a blush? Now this was new. Gokudera ...Sayu? Really? And here Light thought maybe Sayu had some taste.]

So, let's hear that list. She'll be frightened out of her mind if she returns to this place with an arsonist on the loose.