Mifuyu Hatano is the main antagonist in the 2017 anime film Ao Oni: The Animation. She works as a nursing teacher at the school attended by the main characters and is widely praised by students for her beauty and approachable demeanor. Her role in the story is central, as she is eventually revealed to be the force behind the supernatural events that unfold. A key detail is that the student Shouichirou Murakami frequently visits her office, indicating a close or trusting relationship before her true nature is exposed. The narrative positions her as a deceptive figure whose charm masks her antagonistic purpose. Information on her specific background, personality traits, motivations, character development, and any special abilities is not detailed in widely available sources, leaving much of her internal drive and backstory ambiguous within the film's setting.