... Hm, looking at natures, I'd wonder which my Purrloin would come across as. Naughty? Impish? Sassy? Probably not the later. Among the other two... *checks definitions* 

"naugh•ty (ˈnɔ ti) 

adj. -ti•er, -ti•est.
1. disobedient; mischievous.
2. improper, indecorous, or indecent: a naughty word.
3. [b][u][i]Obs. wicked; evil.[/i][/u][/b]"

... Naughty it is. XD