Masterpiece, extremely high quality, beautiful dark fantasy anime illustration, single character only, featuring Momiji in her fully awakened Oni Mode beneath a gigantic blood-red moon.
Momiji is a beautiful young adult Japanese woman with very long flowing black-violet hair, pale skin, elegant facial features, and a sorrowful yet terrifying expression.
Two long, sharp black-purple oni horns rise from her head, subtly illuminated by crimson moonlight.
Her eyes have completely changed from gentle violet to deep glowing crimson red, filled with supernatural power. Her expression should not look purely evil — instead, she appears beautiful, tragic, lonely, and dangerously unstable, as though a kind human heart still remains somewhere inside the monster she has become.
Dark branching oni markings spread delicately across her face, neck, shoulders, arms, and thighs like cracks filled with faint crimson light.
She wears a magnificent corrupted version of her traditional feminine outfit: a flowing black and deep-violet gothic kimono dress, layered with torn translucent fabric, elegant floral motifs, dark obi details, long sleeves, and subtle crimson accents.
The clothing moves violently in the wind, creating a beautiful but ominous silhouette.
Behind her is an enormous blood-red full moon, occupying much of the background.
The moon should feel unnaturally large and oppressive, with dark clouds partially crossing its surface.
The shrine landscape around her is almost swallowed by darkness: distant torii gates, dead trees, broken stone lanterns, faint mountain silhouettes, and black mist.
Around Momiji, restrained black-purple and crimson Oni aura twists upward like smoke or torn fabric.
Small traces of red supernatural flame appear near the ground, but do not overwhelm the composition.
She stands completely alone.