//The worst thing I can think of that could happen, would be Sumireko harming Renko. Second to that would be Yukari capturing her, (and her possibly still being like that). Because if that's the case, we'll never find her as we are. Otherwise, she'll just be flying around causing trouble and probably won't get badly hurt unless what Mamizou was doing was directed towards her.
In short, it might be better to learn how to find her easier since she might not be in deep danger yet. I'm agreeing at the moment.
>"I think it might be better for me to stay and learn this."