Anime Schoolgirl with Molecule Hairpin

Create a polished anime-style half-body portrait of a cheerful schoolgirl character on a pure black background. She has very long {argument name="hair color" default="bright golden blonde"} hair with thick layered bangs, loose hair flowing down her back, and one high side ponytail sweeping to the right. Her eyes are large vivid {argument name="eye color" default="emerald green"}, with a happy open-mouth smile, light blush on both cheeks, and clean black line art. Pose her facing the viewer in a confident friendly stance: her left hand raised beside her face making a V peace sign, her right hand resting on her hip, shoulders slightly angled. Dress her in a Japanese school uniform: a fitted royal blue blazer with exactly 5 visible gold hexagonal buttons total, counted as 2 on the raised left sleeve cuff, 1 on the front center of the blazer, and 2 on the right sleeve cuff; underneath include a white collared shirt, tan sweater vest with ribbed V-neck trim, a purple necktie with diagonal gold stripes, and a green pleated skirt visible at the bottom. Add a distinctive red chemical-structure hair accessory above the side ponytail: a thin red stem from the hair leading to two connected hexagonal molecular rings with small glowing red node dots, plus the red letters “NH” on the right side. Use crisp cel-shaded anime rendering with smooth gradients, glossy highlights in hair and eyes, subtle fabric folds, accurate hands, and a clean high-resolution square composition centered on the character. No extra background elements, no watermark, no additional text except the “NH” on the hair ornament.