First time jumping into this thread, it has just been fascinating to watch this all play out, and apologise if this has already been brought up earlier in the thread; but have we ruled out the fact that HSEESALL, is an anagram of Seashell?
I have no basis on where this might lead, but I thought it was worth mentioning since I only just noticed it. If we were to plug it into the custom PigPen cipher, it fills all but one of the spaces, so, maybe Seashells?