Aoandon
Aoandon, or Aoandō ("blue andon") is a creature illustrated by Toriyama Sekien in his Konjaku Hyakki Shūi. It was meant to represent the spirit that appeared during the game Hyakumonogatari Kaidankai, after the last story was told.
Source: Wikipedia, Aoandon. Text licensed CC BY-SA 4.0. Not endorsed by or affiliated with Wikipedia or the Wikimedia Foundation.