Full-body photorealistic anatomical reference of a fictional AI-generated male character, age 18-19, Northern European English phenotype. Height 1.68-1.70m, weight 57-60kg, ectomorph build — slim, narrow shoulders (38-40cm biacromial), narrow waist, low muscle mass, no gym development, naturally lean at 12-15% body fat. Skin Fitzpatrick Type I-II, porcelain-pale with cool pink undertone, visible blue veining at wrists and temples, minimal body hair (very fine, very light, nearly invisible), faint lower abdominal trail, no chest hair. Face: ash-blond overgrown hair past eyebrows and ears, light blue-grey eyes, thin lips slightly parted, emerging jawline not yet sharp, residual softness in cheeks, minimal brow ridge, no facial hair, minor skin imperfections (small spots near hairline, slight under-eye circles, redness at nose from cold). Prominent clavicles, visible rib outlines, flat chest, thin wrists with visible tendons, long thin fingers with slightly bitten nails, knobbly knees, narrow ankles. Posture: slight forward lean, shoulders rolled inward, hands never settled. Neutral studio lighting, plain grey background, no stylization — medical-reference photorealistic quality. Must read as late adolescent post-puberty but pre-adult muscular maturation. No real person referenced.