Ginko blinks, silent for another few seconds as that sinks in.

"...So you're doing this all over again, then? Just because I got hurt?"

He doesn't sound angry. He's surprised, still a little confused - and cautious. When it comes down to it, they don't know what kind of mushi they're dealing with here (and by now he has little doubt that that's what it is) or what effect it may have if Frisk keeps using it. That would be his main concern here.