[His eyes follow where Sherlock points, and he listens attentively.]
The purpose, you say...
[You know, while he has noticed the creatures nighttime behaviour it isn't something that's pinged him as particularly noteworthy - partly because he's too new to say with certainty that it's different from how the forest monsters usually act, partly because, well:]
Truthfully, I have assumed the very layout of those woods to imply there is something guarded at the heart of them. [Which is to say he's also too new to expect Kiseki to just do stuff for the sake of randomness (sweet summer child).
He's skulked about in them every night since arriving for that very reason - the only thing stopping him from going straight to the center right away is that he can't confidently assume he can handle it when the world itself is obviously stronger than him.]
Do the, ah, regular creatures of the forest never act in such a manner, then? I am aware they typically don't stray close to habitated areas, but...