 There is no explanatory text from Sekien, so it is unclear what kind of yōkai this is.The "o" (苧) in "ouni" refers to the ramie plant or to bundles of string made from ramie, cannabis, among others, so it is said that Sekien gave it the name "ouni" because it conjures up the image of a yōkai with head and body hair made of layers of this o.In the "Hyakkai Zukan" (1737, Sawaki Suushi), a yōkai emaki from the Edo Period, it is given by the name "wauwau," and Edo Period yōkai emaki would usually present it under that name, but all of these were also just pictures, so it is not known what characteristics they had.