Ittan Momen

The Ittan Momen as demons take the form of a scroll with humanoid features such as faces, eyes, mouths and arms.

Though their screentime was relatively minor in "Kaiju" from Las Leyendas episode, they would be crucial in the growth of Prince Akihito to become the Prince his village needs.

Description
Since they resemble paper scrolls, water can significantly hinder their movement. But only fire can finish them for good. While water is only an inconvenience to them, and they can multiply if cleaved in half, Not to mention the fact that they're fast and flexible. They're fatally vulnerable to fire.