semi-realistic ornate illustration, ethereal mermaid with narwhal-inspired unicorn horn on forehead, long flowing white and dusty pink hair blending into dramatic aurora-like trailing fin extensions in pink and purple gradient, delicate serene expression, pointed elf ears, wearing elaborate victorian corset dress with layered ruffled sleeves and lace trim, pearl and gemstone jewelry, ribbon bow accents in dusty rose, ornate baroque pattern details on bodice, elongated shimmering mermaid tail with intricate scale texture, large flowing ribbon-like fin fading from white to deep magenta, dreamy ethereal pose, dark background with ornamental corner filigree decorations, stars and sparkle particles, soft glowing aura effect, delicate detailed linework, pastel white and dusty rose color palette, ornamental fashion illustration style, highly detailed, mystical elegant atmosphere, fantasy couture design