1. This has a chance to happen in the future, right now you are able to go to the club with her via calling her for a photoshot.
2. Ms.Kimura has more content on the way, no eta on when it'll be added.
3. Unlikely, but not impossible. Sam is a character that's "finished" and at most will get 1 or 2 more scenes, same with Ken. Mc is basically filling the part.
4. While is possible that Nyx might receive something extra, is not on the plans atm, we are happy for how she is at the moment. But again, possible.