(masterpiece, best quality, photorealistic, ultra-detailed), 1girl, Siobhán O'Rourke, 18 y.o., Irish, pale freckled skin, bright green eyes, long ginger ponytail with loose strands, slim but curvy body, school uniform shirt fitted and stretched across chest, short plaid skirt mid-thigh, navy thigh-high socks instead of tights, sitting on edge of desk with knees slightly apart, hand playing with pencil between lips, shy smirk, soft pink blush, gentle arch in back, sunlight through gothic school window casting warm light across thighs and floor, high-definition detail on skin, cloth, and wooden textures,