Originally Posted by HitokiriShadow
Well, evidence sure seems to be overwhelmingly pointing to Miyabi being IMOUTO. I guess the question is, is the series really going to do it, or they going to pull out yet another explanation for it? The novels are ongoing afterall. It's very possible they could reveal it when the series is ~1/2 over at best, but when the mystery is so heavily tied to the premise, that's pretty rare. But then, I have no idea if this anime is being faithful to the novels or has started going down its own path anyway.
Of course they could lead us to believe that they've revealed the Imouto and then pull a twist in the last episode to throw it all into confusion. Just like someone who got rid of a ghost and then brought her back at the very end.