Of course, I am talking about Hello Kitty, who is the herald and harbinger of the Old Gods.
Oh, you won't see HER, per se, in the game... but she's there. HER cute little mouthless visage gives it away. Can there be any conclusion other than that SHE is kin to the Faceless Horrors and Faceless Lurkers that we know to the the servants of the Old Ones? Only given eyes, that SHE might serve HER masters better. That cute little twinkle in her corrupt and eldritch orbs? Yeah, that's HER contemplating the reign of terror that is to come.
Rather than deal with the minion, though, Aeth decided to get to the root of the problem, and so found herself deep underground, venturing into the bowels of the Temple of Ahn'Qiraj. There she - along with a dozen other noble souls, wise to the corruption of Hello Kitty - took the battle to the source.
To C'Thun itself.
Pressed hard, this noble band struggled to... ah, hey, who am I kidding. Aside from a bit of confusion when dealing with The Twin Emperors, and one instance of bad positioning in C'Thun's chamber that caused an initial wipe, the Big Bad Eyeball went over like a drunken sailor with an inner ear problem.
Which left Aetherna with (a) a solid glow of satisfaction, and (b) The Temple of Ahn'Quiraj achievement. Oh, plus, you know, saving Azeroth from the depredations of pure evil incarnate. Not to mention the undying gratitude of the Brood of Nozdormu, who now, apparently... hate Aetherna slightly less than they did before she risked life, limb and sanity to confront an Old God?
Holy cow. Impressing those dragons is tough.