For rescuers: the Hunt will definitely be along for the actual rescue! And you can simply assume whatever would be most fun for you to play: if you'd like to have a member of the Hunt along for the ride, by all means, but if you and another player want to do things on your own, that's fine too!

For kidnappees: the spirits will have certain experiments they're conducting, which will be elaborated upon in the log post. So, within the limits of those experiments, go nuts! For example: one of those experiments will be blood and gore, but you can determine just where they cut and how deep they go.

As for trying to escape/healing one another: you're free to play those out as you see fit, so long as they don't succeed.

Kidnappees aren't going to be grouped up, no, and will be free to interact with one another!