Ten years is a long time. You were practically still just a kid in the dream.

[ Everyone grows up at some point. Nier probably figures that the little Hans is a lot different than the older Hans. People gain more experiences over time and stop being a child. That's part of life. ]

There's no need for you to thank me. Really, I didn't do all that much. It just seemed like you were trapped in some kind of bad nightmare.