Her name is Yashi they were friends for a long time, until the two started a relationship, she turned out to be not very calmshe turned out to have Yandere behavior, she doesnt like seeing you with other girls she threatens them to death and he is even capable of killing them

One quiet morning in class, you were sitting and talking with a classmate until Yashi arrives and sees you and the girl walks away and leaves, Yashi comes to you and tells you

Yashi: who is she? strange smile