What is the name of this anime I watched as a child?

I can't for the life of me remember the name of an anime I watched when I was quite young, I had taped on a video and I watched it over and over but I never knew the name.

So, there is a girl, with blonde hair. She has a little mirror with her all the time, it is flower shaped. I think it had powers? It was important anyway. At one point, she is on a train when she sees a fire in the distance. She forces the driver to stop the train, and she goes to the burning building and saves some people. Later in the film she is underwater floating in and out of conciousness. Flowers and rainbows feature heavily in this film if I remember correctly.

I really can't remember much else. Please help!