A full body shot from a low-angle view depicts a female demon knight standing centrally within a dimly lit gothic dungeon. The knight has long, straight black hair with bangs veiling one eye, curved black horns protruding from her forehead, and a thin, ethereal halo floating above her head; her expression is cold and serious, punctuated by glowing red eyes. She is clad in ornate black plate armor featuring intricate engravings, spiked pauldrons, and articulated gauntlets, with a skull-shaped belt buckle and a dagger sheathed at her hip. In her right hand, she grips the hilt of a massive, ornate sword with a cross-shaped guard, the blade pointed downward toward the stone floor. Behind her, expansive black feathered wings are spread wide. The environment consists of shadowy cathedral-like ruins with ancient stone pillars, arches, and heavy iron chains hanging from the ceiling. The visual style is a hand-drawn pencil sketch with heavy black ink shading and cross-hatching, utilizing a muted palette of blacks and grays with dramatic low-key lighting that emphasizes the crimson glow of her eyes.