We now have a colouring for page 4, thanks to panpear.
And the eerie Nefteu Representation have attracted a second version of character reference art, by Dr. B. I'll leave submissions open for more different versions for another week or so, then we'll have a vote-off to determine their looks. (One option I plan to include on the vote is that they're shapeshifters, so they can look like any of the versions - but they all change to the same form simultaneously, so they still always look the same as each other.)