Talk:Oni Oni no Mi, Model: Behemoth/@comment-212.219.81.170-20110715094655/@comment-3387274-20110721162601

exactly. the sea devil Oni model was fed to a sword, so it had a dominant personality by default. However the extreme aggression only manifested itself when the sword was used to fight. I am led to surmise that the devil spirit of an Oni model Devil fruit can only become "dominant" through strong emotion. if you can keep them in check somehow, for instance with telepathy or willpower, You could even risk using the full form of one without going beserk.