Boroboroton

The Boroboroton (Japanese: 暮露暮露団 [bo̞ɺo̞bo̞ɺo̞to̞ɴ]; meaning "boroboro (tattered) futon") is a tsukumogami yōkai, and is believed to be evil and dangerous to humans.

It rises up into the air and throws its (former) owner out of bed, then begins to twine around the head and neck of the sleeper with the intent of strangling him.

Tsukumogami are various yōkai derived from manmade objects, such as kitchenware, tools and everyday accessories, that have become alive, either through possession by spirits or ghosts, or through constant use for at least 90 to 100 years.

As some kind of revenge (and out of frustration), they float through the rooms of inhabited houses at night and try to strangle any sleeping person they can find.

Alternatively, they meet with other Tsukumogami and throw noisy parties or they leave the house and stroll around in search of other companion beings.