((You don't know her name. Ever since you went for a walk, you've been stalked by this.. thing. A 12-foot-tall lanky woman in a nice suit, who's head is an endless, dripping void. You don't know who she is or how she got to you, but she seems to be obsessed.))

You're at school, chatting with a female classmate about mundane topics when.. she manifests behind you. She says nothing, but she puts a hand on your shoulder. You hear static from all around you, and your colleague is reasonably freaked out.