Actually, there is no reason to be believe we'll see anything of Auriko, other than as a statistic. The only ones that got screen time of the commanders of the Dark are currently Ferriko, now firmly deceased, and Argentiko, who just arrived.
There are some 95 naturally occuring elements that are stabel enough to last thousends of years. Some 15 of these are not-metals, leaving Kenko with 80 possible names.
If Kenko goes with a pure metals based naming scheme that is.
What I mean is that there is no reason to think Auriko will be after Argentiko.










