Sword Art Online Progressive, Vol. 6 (manga)

The war between elves rages on, with Kirito and Asuna caught in the middle! The forest elves seek the dark elves´ Secret Key, but to what end? Though Kirito tries to stay detached, Asuna can´t help being swept along for the ride. Kizmel is supposed to be just an NPC, right? But then why does she seem so very human...