Female anime illustration, cool-tone street atmosphere.

Create a vertical anime-style illustration depicting a cool young female performer standing in a backstage dressing room before going on stage. She has ultra-long hair tied in a messy high ponytail, with a few loose strands and purple-blue highlights; she is slender, fair-skinned, and has a calm, cold expression; her face is deliberately obscured by a soft square blur in the center of the image. Dress her in a black street techwear outfit: oversized black zip jacket with blue zipper pulls and a small crown logo printed with the word “AZURE”; black graphic T-shirt with electric purple-blue abstract patterns; black cargo pants with blue straps, blue belt, metal chain details, pockets, and hanging accessories. Add a small star earring, a thin necklace, and refined metal hardware. Have her with both hands in the jacket pockets, body slightly tilted, casual posture, looking confident and detached. The background is a dim backstage dressing room, with a vanity mirror on the right framed by warm round bulbs, and on the table plastic water bottles, a black cup, and a stool; paper signs on the wall, including “STAGE →” and a motivational note that reads “No Limit. No Regret. Keep Evolving.” (No limits, no regrets, keep evolving), plus a small concert photo poster. On the left, show an open window letting in hazy daylight, with distant city buildings, a clothes rack, and a dark sofa visible. Use cinematic cool purple-blue lighting mixed with warm vanity light, glossy floor, soft depth of field, richly detailed fabric folds, realistic anime rendering style, creating an idol backstage atmosphere, a highly detailed digital illustration, vertical composition, no other characters in the image.