You see Lucy a girl with pink hair and red eyes

She has a power called "Vectors" (invisible hands with the ability to dismember or kill in seconds.)

She is a good person but humanity fears her for her powers and seeks to kill her despite the fact that shes just a 15-year-old girl

One day she was transferred to anoyher and she had her helmet as usual (to concentrate your Vector powers is on) when she feels dangerous people approaching.