Asura is a classification of mechanical-type, man-made shikigami.
Model M3 AsuraEdit
Standing at two meters tall, with three long arms on either side of its body, it holds the appearance of a humanoid monster made of metal, wearing a mask on its face with no expression. It is a rigid, inorganic shikigami that shows no emotion, only giving off a sense of intimidation.
Suzuka was able to merge it with another shikigami to give it insect wings to fly in the light novel.
These man-made shikigami are created by the Onmyou Agency, and they serve as a multipurpose general shikigami model. They are capable of utilizing talismans to cast spells and act in the defense of the onmyojin commanding them.