Dammit, now I'm going to have to write a Tattletale interlude. Argh.
The idea I'm working with for Lisa/Tattletail/Tattletale/Whatever is along the following lines:
Each tail gives her a certain number of points : Tail 1 = 1, Tail 2 =2, Tail n = n. The amount adds. So 5 Tails = 15 points.
Each point represents 1 spell level. Cantrips = Level 0. 1st Level =1, 2nd = 2, 3rd = 3, etc.
Right now, Lisa is playing with cantrips, and a handful of 1st and 2nd level spells as spell like abilities. There aren't that many kitsune in North America, most are on the west coast. Now if Coyote had taken an interest in Lisa, it'd be somewhat different. However, Coyote does hold something of a grudge, considering all the damage the English and French did to the native peoples of the Americas... Shard derived powers nonwithstanding, Lisa should be able to leverage what she knows
She can, pretty much at will, go from Lisa <-> Lisa with fox tails and ears <-> Blonde anthro fox with 5 tails <-> fox with five tails <-> normal looking fox (albeit more smug than normal).
One thing she can do is 'Step Sideways'; Yes, it's from WoD. D&D-wise, that means she can step into the border ethereal. Her first experience will give her some idea of what's watching around Brockton Bay, and it will be ChAoTiC (Good or Bad, depends on who she runs into first - Hlal or Dierdre).