Taking off your shoes is common practice in any culture where there's weather that creates mud or snow.
"It's never gonna be used again..."
It's gonna be used again.
With the warning that he didn't like humans, I expected him to be more antagonistic towards them. Yet, most of that was directed at her. But even so, not as much as you usually see in these situations in manga. Which is very suspicious.
Transfer the precognition to a magic device... So that's what it was.
Very suspicious indeed.