Anime Slang Reaction Gacha Poster

Create a vibrant square anime gacha reaction poster in a high-energy Japanese manga style. The main subject is a cute young anime girl with {argument name="hair color" default="white/silver"} very long hair, detailed twin braids mixed with loose flowing strands, blue eyes, pale skin, blush, and a playful wink. She is posed close to the camera giving a big thumbs-up with one hand while the other hand is clenched in excitement, smiling with an open mouth. Dress her in a sporty cropped zip-up jacket in bright cyan and white, oversized sleeves, white short shorts with belts and straps, blue jewel accessories, star hair ornament, earrings, ribbons, and small flower decorations woven into her braids. Use a dynamic comic composition with the character occupying the right and center of the canvas and a huge vertical Japanese slang reaction word on the left reading {argument name="main reaction text" default="それな!"}; make the letters thick, bold, blue fill with white inner border and heavy black outer outline, halftone texture, slight tilt, and impact emphasis. Add a top-left rounded speech-bubble label containing exactly two text elements: {argument name="era label" default="令和"} and {argument name="series title" default="流行語リアクションガチャ"}. Add a top-right collectible sticker badge reading {argument name="rarity badge text" default="SUPER RARE"}, with a small crown and colorful neon outline. Background: bright cyan pop-art halftone pattern with white splashes, stars, hearts, speed lines, comic burst shapes, exclamation marks, and sticker-like outlines. Use crisp manga line art, glossy digital coloring, clean cel shading, high detail, energetic idol-gacha aesthetic, saturated blue-and-white palette, square 4:5 social-media poster crop. Ensure the image contains exactly four visible text groups: the top-left era label, the top-left series title, the large reaction word, and the top-right rarity badge; avoid adding any other readable text, watermark, or logo.