Create a high-quality, ultra-detailed image that blends delicate digital illustration with polished anime-style CG, resulting in a refined 2.5D anime fantasy aesthetic. Depict a petite princess in a knee-up portrait. Keep the core character concept consistent: she has lustrous blonde hair tied in a high ponytail, large clear blue eyes with bright catchlights and delicately rendered irises, radiant skin, an adorable expression, and a sweet smile. She wears an elegant white princess dress with layered ruffles, delicate lace, and refined accessories. The dress should feel graceful, noble, and charming, while allowing the exact lace patterns, accessory details, and fabric flow to vary naturally. The background shows a believable white fantasy castle and a softly rendered sky in the distance, creating atmospheric depth and a gentle three-dimensional feeling. Use soft natural daylight with bright, flattering illumination, avoiding harsh shadows on the character’s face. Allow the model to choose a natural pose, slight camera angle, facial nuance, and composition balance, while preserving the overall concept of a graceful blonde princess in a white dress before a distant white castle.