[Whatever snarky comment he was going to make is stopped by the sudden impact of Harriet flopping onto him. He catches her out of instinct. Hah... guess her soul really is helpless like this. Without knowing of the ability most people had to warp the reality of their own soul room when active inside of it, she was enforcing reality upon herself. It was almost cute.]

Oi, oi~. No need to yell that loud. Though if you wanted to be in my arms that badly, you just had to ask.

[...he's a bit grateful that her hands are tied because she would probably beat him up for that joke otherwise. Or try, at least. A little more seriously now:]

You're binding yourself to reality. You just have to trust in yourself not to fall over and you won't. This is the room of your soul. It can't hurt you. It can hurt me, since I'm intruding... but not you.