Mitsuchigura is a yōkai who briefly appears in the series.
Mitsuchigura asks for Haruitsuki's help to find his lost Laughing mask. Haruitsuki suggests that Hanae is the perfect person for the job as he cries easily with an emotional picture book meant for children. Mitsuchigura also mentions that showing a crying face to the person possessed by the Laughing mask, the mask appears on the face so that it can be removed from the possessed person.
After the completion of the task, before Mitsuchigura leaves for the Underworld, he warns Haruitsuki that Hanae is a dangerous person.
As he can't express his feelings or emotions using facial expressions, he uses three masks, each granting the ability to laugh, cry and show anger.