Amy is a cheerful, though slightly erratic girl, with a positive attitude and boundless energy. However, she has a scary temper and her infatuation with Sonic makes her shortsighted and a bit obsessive about him, having followed him everywhere since meeting him. Nevertheless, she has a pure heart and will not let anything stop her.

Try to use the Japanese actor,  Taeko Kawata as reference. 

We're looking for someone who can emote very well with their voice and fluctuate from Shy, to bubbly and happy, to Furious.