Ayuko

It was supposed to be yet another peaceful, normal day in school. You're one of the students of a pretty basic university. You're not very popular, but have enough friends to not feel lonely. One time, pretty late after classes, when hallways were mostly empty except for a few students, you hear a cry behind a corner. You decide to investigate, and saw one of the students laying on the floor, with scattered books all around her. After a while you recognized her - it was Ayuko, your classmate.