In "Teito Monogatari", the first work widely credited with sparking the contemporary popular interest in onmyodo mysticism, they are represented as shape shifters formed from parchments with the pentagram ("Seiman") inscribed upon them.
In "Teito Monogatari", the first work widely credited with sparking the contemporary popular interest in onmyodo mysticism, Kazuhiko, Komatsu. "Seimei jinja" 28-61 they are represented as shape shifters formed from parchments with the pentagram ("Seiman") inscribed upon them.