(*Note: This is a legend from Shin Megami Tensei: Devil Summoner and has no historical parallels.) Inui was a
well-known veteran Imperial officer (or colonel) who was said to have committed suicide with his entire forces for unknown reasons. It was said that after his death, Inui became a Ghost (or Undead) that haunts the area where he died.
Inui appears at the end of Dungeon P, a section of the Extra Dungeon that heavily resembles Dungeon Q. He can only be reached if the protagonist walked over certain tiles that turn into pits afterwards.