||06-06-2013 11:58 AM
I know it won't be, but I hope it's Ahri.
According to the Shinto religion, Kitsune gain a tail every hundred years. If they live to a thousand, instead of getting a tenth tail their fur turns gold and they become a Tenko, which is a celestial being. (Ahri's abilities are likely based off of a Celestial, since they're capable of teleporting, throwing spheres of light at enemies, etc.)
Start with one tail, gain a second at 2, then gain a new tail for every two levels up until level 18, at which point her hair turns silver, fur turns gold, and gains a slight aura. Have Inari, whom Kitsune are messengers for, talk in place of Ezreal's onboard computer. And so on.
Edit: It's been pointed out that Ahri is a Kuhimo and not a Kitsune. Which makes it easier. Just name the skin either 'Kitsune Ahri' or 'Inari's Messanger Ahri'.