Persona 5-inspired pop-art anime poster for a custom chuunibyou character

Generate a visually explosive and trendy pop-art anime illustration. The main character of the image is "{argument name="character" default="an over-the-top chuunibyou knight"}", and the overall style should reference Persona 5 and street graffiti visuals, turning the character into an extremely flamboyant, extremely flat, ultra-cool anime figure. Use sharp cel-shading for the character, with hard, clean lines and crisp contours. The pose must be exaggerated and full of motion. You can use wide-angle or fisheye perspectives so that hands, weapons, or props appear extremely close to the camera, like a freeze-frame at the moment a special attack is unleashed. The expression should be highly dramatic, with confident, manic, or cold-blooded "overacting" intensity, rather than a calm everyday look. Reject realistic volume and shading; instead, rely on large areas of pure black heavy shadows and highly saturated flat color blocks to create an extreme, high-contrast flat look. The main colors can be bright red, lemon yellow, electric blue, neon purple, etc., contrasted against large black shadow silhouettes. Add screentones, halftone dots, speed lines, and radiating lines in the shadows and background so the image feels like printed manga layered with street graffiti. The background does not need realistic perspective space; it should be a flat visual collage stage filled with huge sans-serif English letters, torn paper effects, ink splatters, bold arrow graphics, speech bubbles, and onomatopoeia, such as exaggerated "BOOM", "SLASH", or "WAKE UP" graffiti sound effects. You can integrate UI elements into the scene—health bars, skill names, buttons, numbers, tooltips—floating around the main character, as if the game interface and the illustration have merged, breaking the fourth wall. Keep lighting high-contrast but not physically realistic; think in terms of graphic design areas of black/white/color rather than natural light logic. Edges between color areas on the character and background should be very sharp, without soft gradients; all colors should be clearly separated. You can add rough spray paint, smears, or hand-drawn graffiti textures in select areas to enhance the street and handmade feel. The overall mood must be extremely dynamic, extremely chuunibyou, and extremely cool, as if the image is about to explode out of the screen, not quietly hang in a gallery. Avoid realistic oil painting styles, low-saturation vintage looks, or gentle, soft illustration styles. Do not use natural landscapes or everyday life backgrounds, and avoid soft, pastel color schemes. The image should be a vertical 2:3 high-resolution illustration, suitable as a tension-filled, maximalist pop-art manga poster.