Elegant Oni Warrior Portrait

A beautifully crafted anime illustration depicts a tall, adult female demon, presenting a calm and elegant full-body portrait. She stands in three-quarter profile, her hands clasped on the hilt of an upright longsword. She possesses extremely long, straight hair.{argument name="hair color" default="silver-white"} Her hair fell past her knees; her skin was pale, with elfin-like pointed ears, narrow, deep red eyes, and two smooth, curved red horns on her forehead. Her expression was cold, aloof, and slightly melancholic. She was dressed in {argument name="outfit style" default="White formal kimono with black and red accents"} The inner layer is a fitted white dress with a deep neckline, cinched with a black belt and layered waist embellishments. Over this is a semi-transparent patterned robe with subtle geometric designs; the wide sleeves are lined in red, and the hem is decorated with smoky, dark flame patterns. Her forearms are covered in polished silver armor, adding to her warrior aura. The massive, heavy sword is planted vertically before her, its blade and hilt black, fitted with a metal guard, and a vibrant, luminous red flame pattern flowing from the center of the blade. The composition is elegant and balanced, blending traditional Japanese aesthetics with a dark fantasy style. The background is a soft, pale lavender-grey decorative collage, featuring a circular window framing a landscape of Mount Fuji and a winding river, delicate floral silhouettes and blooming branches, abstract cloud patterns, hanging tassels, geometric fabric patterns, and a red sun halo on the right. The main color scheme uses soft white, lilac, grey-purple, black, and deep red. It incorporates subtle paper textures, clean lines, soft cel shadows, delicate highlights, and a gorgeous, highly detailed anime style. The overall atmosphere is tranquil, noble, mysterious, and slightly ominous, like {argument name="character name" default="Oni Alter"} The image is featured in a luxurious Japanese fantasy key visual.