Havn't heard of the nine-tailed kitsune? the more tails a kitsune has, the more powerful they are. with nine-tails being the max and they effectively are reveered as demi-gods or actual spirit deities to pray to at that point.<br/><br/>Thats why you see Naruto with a nine-tailed fox sealed inside him. Thats why Ahri from league of legends is nine-tailed. It's a display of power effectively. So Mana growing tails as the campaign goes on is a sign that she's becoming more and more like a walking miracle upon Glorian. (Or you know, since you're the gm, however you want to play that out.)