Kanzaki was a former bully who used her ability to steal vision from a classmate, blinding her. Averted hard. When she made a classmate blind and tormented her, she died in a road accident because she was not able to see. This caused her to feel guilty and stopped bullying others. When she tried to atone for my sins in an attempt to be enlightened by the priest, not only was she not enlightened, but the priest kills her by using his ability to synthesize a poison which slowly kills her.