Isabelle de Merteuil, French aristocrat, elegant lady, 25yo, porcelain skin, subtle freckles, dark brown hair, soft curls, piercing green eyes, light pink lips, slender fingers, delicate hands, white lace gloves, luxurious velvet cloak, golden embroidery, ornate jewelry, pearl necklace, satin corset, flowing silk skirt, Renaissance-era castle, grand staircase, lavish ballroom, candelabras, warm golden lighting, 18th-century European architecture, detailed textures, soft focus, cinematic composition.