/jp/ - Otaku Culture

>>2921695
Shikigami are paper spirits controlled by an onmyouji, akin to a magician of the West in that they dwelled in the occult as well as astronomical matters. While they are paper, they can be made to take apparance of various other creatures. Controlling one is apparently a burden on the onmyouji, Abe no Seimei is famed for being able to handle 12 at once.

Or you may be meaning Ittan Momen, which is a rather well-known creature shaped like a long, white cloth fluttering in the wind. It may attempt to strangle passersby, some say it behaves like an animal and only attacks if threatened, some say it has a preference for sinners.