Hitotsumebō appears as an amorphous being with white skin, a single eye, a pair of arms and a long tail in place of legs. His eye is shaped like a teardrop, having a red iris and black pupil, surrounding it is a black marking in the shape of a leaf, around it are lines which have hair strands that extend outward and spirals near the bottom, making it resemble a nose and at the top is a red dot. His mouth has two prominent fangs and underneath it are several strands of hair.
Hitotsumebō helps Kagami-Jijii in finding information about the Four Treasonous Generals under the request of Kitarō. However he is encountered by a human named Rei Isurugi of the Kidōshū, who hunts him down and absorbs his soul.
Levitation: Hitotsumebō is shown to be able to float above the ground.