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The power to use the abilities of oni. Variation of Demon Physiology, Ogre Physiology, and Yokai Physiology.

Also Called

  • Kijin Mimicry/Physiology
  • Oni Mimicry


A user with this ability either is or can transform into an Oni, variously translated as demons, devils, ogres or trolls. Depictions of oni vary widely but usually portray them as hideous, gigantic ogre-like creatures with sharp claws, wild hair, and horns growing from their heads. They are humanoid for the most part, but occasionally, they are shown with unnatural features such as odd numbers of eyes or extra fingers and toes. Their skin may be any number of colors, but red and blue are particularly common and are often depicted wearing tiger-skin loincloths and carrying iron clubs.

Oni were originally invisible spirits or gods which caused disasters, disease, and other unpleasant things. These nebulous beings could also take on a variety of forms to deceive and often devour humans. In folktales they are usually malicious, man-eating creatures to be feared and slain by valiant heroes, the oni can also have a protective function. They are often described as rowdy, party-loving bunch with fondness for contests and games.

Most oni, especially in folktales, are rather foolish and/or simple beings, but some are both highly intelligent and creative.






  • Most oni are rather foolish and/or simple.
  • Oni tend toward rowdy, rough and generally belligerent personalities/behavior.
  • Certain normal items affect oni negatively, especially beans are painful to touch.

Known Users

See Also: Oni, Oni and Oni.


  • Hōzukimaru (Bleach); in spirit form.
  • Kenpachi Zaraki (Bleach); via Bankai
  • King Yenma (Dragonball series)
  • Shane (Grimms Notes)
  • Hoozuki (Hoozuki no Reitetsu)
  • Hildra (Interspecies Reviewers)
  • Eve Kurohimeyama (Inukai x Tribe)
  • Sakura (Koibito wa Oni no Hime)
  • Wrath/Sasajima Kyouya (Kumo Desu ga, Nani ka?)
  • Kino (Monster Musume)
  • Shuten-Doji (Omamori Himari)
  • Ram (Re:Zero Kara Hajimeru Isekai Seikatsu)
  • Reise (Re:Zero Kara Hajimeru Isekai Seikatsu); side story only
  • Rem (Re:Zero Kara Hajimeru Isekai Seikatsu)
  • Akaoni (Smile! Pretty Cure)
  • The Little Ogre (Soul Eater)
  • Saizou Komiya (Rosario + Vampire)
  • Akiha Tohno (TYPE-MOON)
  • Kouma Kishima (TYPE-MOON)
  • Akuji no Takamaru (TYPE-MOON)
  • Benienma (TYPE-MOON)
  • Ibaraki-douji (TYPE-MOON)
  • Kijyo Koyo (TYPE-MOON)
  • Otakemaru (TYPE-MOON)
  • Shuten-douji (TYPE-MOON)
  • Various Oni Yo-kai (Yo-kai Watch series)
    • Gargaros
    • Gilgaros
    • Ogralus
    • Orcanos
  • Gōki (Yu Yu Hakusho)


  • Alpha Girl (Hero: 108)
  • Oni Generals (Jackie Chan Adventures)
  • Tarakudo (Jackie Chan Adventures)
  • Oni and Oni hybrids (Lego Ninjago: Masters of Spinjitzu)
  • Oni Mask users (Lego Ninjago: Masters of Spinjitzu)
  • Samanosuke Akechi (Onimusha: Warlords)
  • Jubei Yagyu (Onimusha 2: Samurai's Destiny)
  • Jacques Blanc (Onimusha 3: Demon Siege)
  • Hideyasu Soki Yuki (Onimusha 4: Dawn of Dreams)
  • Violet Ogre (Regal Academy)


  • Oni (Japanese Mythology)

Live Television

  • Oni Kamen Riders (Kamen Rider Hibiki)


  • Reginald Stuart/The Evil One (Sgt. Kabukiman N.Y.P.D.)

Video Games

  • Oni Operators (Arknights)
    • Hoshiguma
    • Matoimaru
    • Noir Corne
    • Yato
  • Coachmon (Digimon Universe: Appli Monsters)
  • Fierce Deity Link (The Legend of Zelda: Majora's Mask)
  • Drahmin (Mortal Kombat)
  • Moloch (Mortal Kombat)
  • One-Eyed Oni (Nioh)
  • Onryoki (Nioh)
  • Yoki (Nioh)
  • Glalie (Pokémon)
  • Oni (RPG)
  • Zeti (Sonic Lost World)
    • The Deadly Six
  • Oni (Street Fighter)
  • Suika Ibuki (Touhou)
  • Yuugi Hoshiguma (Touhou)
  • Assassin "Shuten-douji" (TYPE-MOON)
  • Berserker "Ibaraki-douji" (TYPE-MOON)
  • Oni (Valkyrie Crusade)

Known Objects

  • Oni Masks (Jackie Chan Adventures)
  • Oni Masks (Lego Ninjago: Masters of Spinjitzu)