The Oni Oni no Mi, Model: Yasha is a Mythical Zoan-type Devil Fruit that allows its user to transform into a Yasha hybrid and a full Yasha at will, making the user a Demon Human (夜叉人間 Yasha Ningen?). "Oni" is a popular Japanese term for "Demon". It is called the Demon-Demon Fruit, Model: Yasha in the FUNimation Dub. It was eaten by Marine, Lieutenant Kazama Hiroshi. It's One of the Twin Oni Oni no Mi Model's Discovered, Experimented and Enhanced By the leading scientist in the employment of the Marines, Dr. Vegapunk the other being the Oni Oni no Mi, Model: Kishin.