A fictional adult woman in her late twenties with auburn hair in a low bun and a serene expression, seated on a broad completely smooth foundation stone in a violet-lit studio, wearing royal violet lace lingerie and an open dark robe, plain smooth uncarved stone blocks stacked behind her, photorealistic, vertical portrait, no text, no letters, no numbers, no carvings, no engravings, no symbols, no logos, no watermark