Teke Teke is an Onryo or a vengeful spirit.
Teke Teke was once a school girl that has fallen on a railway and was ran over by a train cutting her body into half. Teke Teke has no lower body and was said to be carrying a sickle when haunting train stations at night.
The name Teke Teke came from the sound its making whenever she drags her body when chasing her victims. They are fast and she kills her victims by slicing their bodies in half leaving them dead imitating her tragic death.