I guess, my voice isn't super high but it might be good. Here, take a listen to my soundcloud, it's mostly just me recording weird yandere lines or quotes or some crap. Most of my recent stuff is more goofy and less kawaii voice. My mic sucks, that is very evident.
https://soundcloud.com/boogerchanThis one probably has my best "little girl" voice
https://soundcloud.com/boogerchan/onii-chan-is-an-oni>>1018rude. I'll be 20 in February! respect your Onee-chan!