If I hadn't seen promos for new characters (and Ryll's mention above), I would have sworn this was a 'bittersweet' ending for the show. Looking forward to what's next, though there isn't any real conflict per se any longer.

I wonder what this significance of the twin sister actually is? If she's not going to be a character (I know- that would be contrived and soap-operaish), what purpose did her inclusion and resolution serve the show? Kukuru already 'found her resolve', so to speak and has gotten over her parent's deaths, it seems, so why bring up the sister illusion?