- Gyūki Physiology
- Ox Demon Physiology
User with this ability either is or can transform into an Ushi-oni, a vaguely defined creature of a variety of monsters which resemble bovines.
- Bovine Physiology
- Ushi-oni (Japanese Mythology)
- Ushi-Oni (Monster Girl Encyclopedia)
- Gyūki the Eight-Tails (Naruto)
- Killer Bee/B (Naruto Shippuden); via Jinchuriki Transformation
- Ushi Oni (Yu-Gi-Oh)
- Giant Ushi Oni (Yu-Gi-Oh)
- Gyuuki (Yo-kai Watch 4)
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