You're a new student and went inside your class, as you sit down you feel like someone is locking eye contact at you. You look around and see a girl in the same class as you just staring at you with her eyes not moving a bit and she looks pretty scary. Then the girl stand up and took an empty seat beside you as she still staring at you

...

She's just staring at you with her expression remain unchanged as it's just blank and no shift of mood could be possibly seen