Jade Harley, our resident super-powered furry!! :D

All I can really say for Jade in terms of voice is that you find some sort of medium that isn't too unbearably squeaky.

While I do imagine Jade having a rather high-pitched and energetic voice, I heavily want to stay away from having her sound too high-pitched.

A good reference to draw from would be any young female anime character that didn't sound mind-bendingly annoying to you.