Not to take this conversation too far off topic, but it might be worth it to throw in some clarification in the Wiki on the Soulmist thing. It is kind of vague about being Soulmist, at least how I read it. If anything, directly stating that Ghost = Soulmist would help avoid confusion, instead of how it currently sounds to me (Ghost and his Soulmist, like it is a separate thing).
A wounded ghost sheds a part of its Soulmist and experiences great pain. Since Soulmist regenerates very slowly, an injured ghost will usually flee rather than risk losing more of it. Losing Soulmist also deprives the ghost of its powers, making it helpless.
I think the quote above from the wiki is the one that kind of hints that Soulmist = Ghost?