Board Thread:General Discussion/@comment-27907368-20160506131212/@comment-27620479-20160507210406

Or Frisk lets you back. Like Flowey does when he can take the souls.

And since we are at it: where are they? We have seen them leave Asriel with all the monster souls. And those returned to their owner. And human souls linger for a while. So, basically, Frisk and all monsters leave Flowey behind with six MIA souls. Now, that is really comforting. I'm sure nothing bad can happen.

Don't get me wrong, I only do pacifist, and don't intend to change my mind on that, but it takes some headcanon to assume that it really ends well.