Raijin is the sixth, yes; I'm sure he'll put his character there when he's ready, no worries at this point.  I'm not bothered by someone posting IC without moving their CS to the characters tab if they have been otherwise approved.

You do raise a good point, though, about avoiding confusion about who's been accepted into the RP.  I will probably edit my post in the characters tab to include a list of players with their respective characters so it can just be glanced it.  Not sure I'll get to it immediately, but it seems like a sensible thing to do.