//I was mostly musing out loud, since as far as I'm concerned it's 100% up to Kono how long she wants to stick around. I certainly wouldn't push her to stay the way she is or unfuse, especially if she didn't want to do whatever Dai wants her to do, and even if she asked something like "Do you want me to" or "Do you think I should", I would prefer to spin it right back at her without offering an opinion.
//The shoe is curious. Footwear aside, I doubt Furi would have gotten there that fast, and even if she did I don't know how she would have grown without our noticing. The same is true for Gasanae (who may or may not have actual shoes) or Seija (who has sandals), and Shinny goes barefoot. It might be Lily or one of The Three Stooges, but if I had to guess I'd guess Suika, sent by Reimu to play goalie as best she can.