Pastel Anime Idol Concert Finale

Create a vertical full-body anime concert illustration of {argument name="character name" default="Halo"}, a delicate teenage idol standing center stage and facing the viewer, holding a large futuristic white megaphone with translucent cyan and pink glowing accents close to her chest. She has a short airy bob haircut in {argument name="hair color" default="almost white with soft pastel pink and blue highlights"}, straight bangs, a tiny ahoge, a small strawberry hair clip on the left side, pale skin, big sparkling blue-pink eyes, rosy cheeks, and a gentle shy smile. Her outfit is an oversized white T-shirt with soft folds, very wide pale blue denim pants, chunky white sneakers, and a light blue-and-white plaid shirt tied around her waist with the sleeves hanging in front. The scene is a dreamy summer live-show finale: a huge cheering crowd fills the background with countless cyan, blue, pink, and purple glow sticks; bright stage spotlights and metal truss structures shine behind her; two black wedge stage monitors sit near the lower left and lower right edges. Fill the air with falling confetti pieces in exactly four visible colors: pink, cyan, pale blue, and white, plus tiny glittering light particles. Use a soft pastel watercolor anime style with thin clean line art, luminous bloom, backlighting, gentle haze, high-key exposure, reflective wet-looking stage floor, and an emotional magical atmosphere. Composition should be centered and symmetrical, full body visible from head to shoes, low-to-mid camera angle, portrait 2:3 aspect ratio, no text, no logo, no watermark.