Oni

Oni (鬼), translated as "demon" or "ogre", can be referring to one of the following topics:
 * The early tentative title of NIOH.
 * The official codified term for the monstrosities in the Toukiden series.
 * The "dark" energies and entities in the Fengshen Yanyi series.
 * A member of a mystical race in the Harukanaru Toki no Naka de series.