1. Nausicaa (Of the Valley of the Wind)
One of the most admirably courageous and pro-active pacifists I've ever seen in a work of fiction. She's not afraid to act when necessary, and not afraid to lead by example to show others that violence isn't always necessary to get results. Granted, she does disillusion herself for a matter of moments due to -extreme- duress in one situation. She generally acts as a shining example of how mature free-thinking people should probably behave in times of crisis

(I could nominate Ash<i></i>itaka of Mononoke for most of the same reasons, but he's a little more violent and I'll stick with just my best Miyazaki example. I'll try to think of a few other good ones for you from other works)