[Ha ha! He trusts Kagachi, that's wild! So all is well knowing the doll is with Kagachi instead of plaguing his elder brother... He sighs quietly in relief.]

I'm not sure. Junpei-san and Wei Wuxian-san didn't know either. It's strange, too, that it says "sound"? How they sound... Are we meant to be listening, or is it a human expression?