(first person to say teke teke gets a shout out at the next chapter)
the teke teke is a Japanese urban legend about a ghost of a young women ; or a school girl, who fell on a railway line and was cut in half by an incoming train. Now as a vengeful spirit, she travels on either her hand or elbows, her dragging upper torso making a scratching or 'teke teke' sound, if encounters anyone at night and the victim is not fast enough, she will slice them in half at the torso, mimicking her own disfigurement.