Eritategoromo is a a Buddhist high priest’s kimono that has transformed into a yokai. It still looks mostly like the high-collared ceremonial robes of a priest, however the long, pointed collar has transformed into a long, pointed nose, and it has sprouted eyes and a beard.
Eritategoromo was once the kimono which was worn by Sōjōbō, King of the Tengu, who lives on Mount Kurama, north of Kyoto. Sōjōbō is a fearsome, powerful, wise, god-like monster, with the strength of 1000 ordinary tengu. He is a master swordsman, and was responsible for training a number of famous legendary heroes of Japan, such as Minamoto no Yoshitsune. Though he is an ascetic yamabushi and great teacher, like any tengu, Sōjōbō has an evil side too: he is said to feed on children who wander too deep into the mountains.