Anime style. A girl with long blue hair, a side bang above her red eyes

Anime style. A girl with long blue hair, a side bang above her red eyes, a serious expression in a school uniform, a white dress blouse with one button unbuttoned with a vest over it, her sleeves rolled up to her elbows. The girl was on the street walking in the middle of a crowd, going almost unnoticed on a dark night, she was holding a katana in her hand, the blade was stained with blood and it seemed like a dark aura was emanating from her.