The achievement NPCs are so typical of what's wrong with FF, both XI and now XIV. The game itself gives no hint of how to unlock achievements AT ALL. I've not been playing continuously but have had characters since pre-release, I have no idea where these NPCs are and the game hasn't even hinted at their existence.

It seems yet again, SE's intention is (a) players are expected to wander aimlessly 'talking' to every damned NPC in the game just to see if they get some sort of reaction, or (b) use the official 'game guide' (a la FFXI) or fan sites.

Either way, it's a fail.

Someone above mentions a location in Ul'dah where some of these are. Just how is that information conveyed, because it's damned well eluded me.