They live in a deep pit that acts as their nest somewhere in the forest of Eishū.
Unlike the Sōshin, the Mōnshin are all identical. They are large beings at least 5 meters tall, with dark, skeletally thin, female humanoid bodies that are pierced with shakujō. They have long dark hair, arms for eyes, and mouths wide open to reveal their long elongate tongues.
Like the Sōshin, the Mōnshin also lack intelligence. They have no free will of their own and bend to the will of whoever has control of the Horse Flute, even to humans who use it.
Abilities and Powers
Though they are low class, the Mōnshin are considered to be much stronger than the Sōshin as one was capable enough to eliminate a group of Iwa shinobi. They have been shown to possess enough endurance to race all the way to Hōrai and are sturdy enough to destroy the palace's walls.
The Mōnshin are based off of the Menshen (門神 Gate Gods?), divine guardians of doors and gates in Chinese folklore that are used to protect against evil influences or to encourage the entrance of positive ones.