Akaname/Origin

Origin
The akaname (垢嘗?) is a demon or yōkai from Japanese folklore. Meaning filth licker in Japanese, akaname can also be translated to mean red licker since aka is an homonym for red and filth. For this reason the akaname is often described as being red in colour.

The akaname is the “personification of the fear of using a dark bathroom late at night.” It is said to come out at night to literally lick up the grime and dirt that accumulates in unclean bathrooms.