I wasn't really sure whether or not to dig up a very very old topic on this subject (dating back to 2010)... I did try to troubleshoot my issue with that topic, and with the advices that had been given at that time. I tried every hill I could possibly climb, even partway, in the map of Adventurer's Plain. I even got myself stuck in a few interesting spots, in the process. However, I could not find my way up around any of the three different waterfalls I identified within the region to check if the NPC I needed might, indeed, be mis-spawned in that area.
I distinctly recall seeing this NPC when I first started the game (about three weeks ago). I distinctly recall a dialogue about "what could this person possibly be doing back here?" However, that NPC is, now, most assuredly missing from where they should be. And, in chasing down the probable location of where Arua actually would appear (out in Breezy), it's not a skip-able step, either.
Anyone have any input or advice concerning this issue? Would posting a ticket via the ingame link be appropriate?