See, that’s the beauty of this series; this is actually a very plausible way of looking at it. Maybe she really was trying to help, despite her 360 turn in personality whenever Keiichi lies. Perhaps Keiichi was just being waaaay too paranoid! And maybe that’s what got him into this whole mess to begin with!
That’s at least one thing that I can find believable by the end of the series; Mion and her family are hiding some secret. Whether it has to do with humans performing the killings, or if it is simply in regards to safety against onikakushi, we don’t know quite yet…
+1 humans, then
I just wish it would be soon T_T