Having met nearly everyone in this “mirror world”, Koyomi takes stock of the different ways the people he knows have changed, and acknowledges that this is far from simply a matter of left becoming right, or even right becoming wrong.
Black Hanekawa is his Tsubasa’s alter ego. Rainy Devil’s hatred lurks within his Kanbaru. The happiness of her alternate dwells deep within his Sodachi. Kuchinawa is an inseparable part of Nadeko.
These seemingly different or opposite people are really much the people he knows as the people he knows, only in his world these are the sides hidden, suppressed, lurking beneath the everyday surface, for good and/or ill. As Mayoi has him consider where his alternate might be, he contemplates Oshino Ougi being in his world while he’s here.
But Mayoi also tells him to sleep on it, and take what opportunities might come. To Koyomi’s surprise, Sodachi is his bunkmate, and after lights-out offers some sleepy insight into mirrors—which typically only reflect about 80% of the light that hits them. The rest is absorbed, meaning the only way to truly see ourselves is to see a “blurry reflection”, something less than 100% the reverse of what you put into it.
That opportunity Mayoi mentioned might come comes in the form of Ononoki, but there’s something different about her, which is to say there’s something the same about the way she’s supposed to be. Her expressions and emotion and tone are all back to normal.
She reports that when she saw Koyomi’s reaction to her as she was (including not removing her “bottoms” as is supposedly his alternate’s dirty habit), she essentially rebooted and updated her personality—something among all the others she’s uniquely equipped to do.
Ononoki tells Koyomi she’s arranged to have the former Kiss-shot meet with him, and takes him on a journey to see her. I say journey when it’s more of a dazzling odyssey. As she lets the withering insults of her twisted personality fly freely, the surroundings of their trip to Shinobu fluctuate between dreamy hyper-realism to intricate 8-bit nostalgia.
Very few shows excel better at distracting you from long conversations with diverse dynamic visuals and eclectic music. This culminates in the most lavish setting yet: a classic Disney-style castle at the site where Koyomi expects the cram school to be; which he assumed might not have been destroyed by the Tiger like it was last Summer in his world.
As he and Ononoki let themselves into the magnificent edifice and walk through its vast moonlight-bathed halls, he contemplates what kind of person Shinobu might be. Did the other Koyomi never meet her bleeding to death in the subway, and never made a pact to save her life and made him a vampire? Is she Full-Power, Non-Former Kiss-shot and all the rest?
Well, once he enters her ethereal bedchamber, spots her silhouette, and hears her old-fashioned, polite salutations, it dawns on him: she’s not a vampire at all; she’s human. Judging from her castle, perhaps she still goes by the name Princess Rola?