A modern day onryō or vengeful spirit, Tek Tek is a urban yōkai brought about by inventions of the modern world. She is a school girl who fell on the railway line and was cut in half by a rain. Now in her yōkai form she pulls the upper half of her torso along by dragging herself on either her hands or her elbows. The name comes from the scratching sounds she makes as she drags herself along the ground. A particularly violent yōkai, she carries, a knife, a scythe or a saw depending on the story and uses them to dismember anyone who is too slow to escape her. Who the human girl was originally is not clear, but the fact she is now an onryō suggests that she may have been pushed on to the train tracks.
In many of the accounts, she targets young school children, but will happily attack adults too. Tek Tek is the need for yōkai reaffirming itself in the modern world, turning the shadows and strange unfamiliar noises into something hostile. Unlike other female yōkai of modern times there is no protection or strategy against Tek Tek and modern depictions have portrayed her as exceptionally violent and vicious. She doesn’t warn you she is going to attack. She just does so, and all you can do is run.