Aoandon

Aoandon's best-known representation comes from Toriyama Sekien's Konjaku Hyakki Shūi, where Sekien illustrated a creature labeled Aoandon and associated it with the Hyakumonogatari Kaidankai parlor-game. Sources link the name and concept to the practice of placing candles in blue-paper andon lamps during that ritual; Sekien's compilation presents Aoandon as the spirit that appears after the final (one-hundredth) tale is told. The available sources do not assert whether Sekien invented the figure or recorded a preexisting folk belief beyond his illustration and labeling.

In the cited illustration and descriptions Aoandon appears as a womanlike figure with a blue complexion, twin horns emerging from the brow, and sharp teeth. The depiction ties the blue coloring to the name (blue andon) and frames the being as a personified uncanny presence rather than a naturalistic animal or human.

Classical sources provided do not record specific powers, actions, or interactions for Aoandon beyond its representational role: it is described as the spirit that appeared during Hyakumonogatari Kaidankai after the last story was told. Modern popular-culture works (for example the mobile game Onmyōji) reinterpret Aoandon as a storytelling shikigami who delights in tales; such portrayals are contemporary adaptations rather than documented aspects of the classical descriptions.