the Job quest trainer 'Fray', is eventually revealed, by the end of the level 50 quest, to actually be
you, or rather, your character's dark side, given form by the DRK Job crystal and your character's suppresed frustration and resentment towards how they were treated at the end of ARR's story (thus effectively they're sort of a 'fake WoL'). At first Fray's comments and attitude seemed fine, but as the DRK Job quests progressed, things seemed a little... off. When 'Fray' starts attacking other npcs verbally, when it seemed like Fray was the one talking, the response from the npcs is that
you were the one yelling at them, insinuaiting that 'Fray' wasn't even there. And finally, by the level 50 DRK quest, 'Fray' is revealed to be
dead all along and his corpse has been simply reanimated by your dark side, 'Esteem' (which is literally an evil you in every way, right down to having your character's face!), who proceeds to attack you, resulting in you having to put Esteem down and defeat it, and ultimately supress your inner darkness.