A medium shot, low-angle anime illustration depicts a tall, mature oni woman standing prominently in the center of a mystical Japanese battlefield during the daytime. She has a dignified expression, white semi-short hair tied in a long ponytail at the back with thin braids framing her face, short horns protruding from her forehead, and piercing red eyes. She is dressed in a tight-fitting white sleeveless kimono paired with long white hakama featuring a black tiger pattern, complemented by black kote (gauntlets), suneate (greaves), and a domaru cuirass; a long Japanese sword is fastened to her left hip, and she grips a naginata firmly in her right hand. Behind her, a vast army of oni clad in full armor stands in disciplined ranks, partially obscured by a thick, ethereal mist. The scene is set in a fantastical, fog-shrouded battlefield with a muted yet atmospheric color palette, emphasizing a sense of solemnity and strength under the bright daylight.