Anime Cosmic Header Banner

Create an ultra-wide social media profile header banner in cinematic anime style, with black letterbox margins above and below the artwork. The scene shows two characters flying through a luminous outer-space highway: a dynamic {argument name="main character" default="teen boy"} crouches low on a futuristic skateboard/hoverboard in the foreground, leaning forward with one arm extended for balance, wearing a light hoodie, dark shorts, socks, and black sneakers; beside and slightly behind him floats a tiny angelic {argument name="companion character" default="white-haired girl"} with large white feathered wings, pale skin, a frilly white dress, and a soft glowing expression. The background is a deep blue-purple galaxy filled with stars, planets, moons, ringed planets, distant futuristic crystal towers, holographic geometric structures, and glowing orbital city platforms. A wide ribbon-like cosmic road sweeps from the left background toward the center foreground and curves into the distance, made of sparkling cyan, violet, pink, and white light trails, giving strong speed and wonder. Use dramatic perspective, detailed anime faces, soft rim lighting, radiant particle effects, high contrast, magical sci-fi atmosphere, and polished digital illustration quality. Canvas ratio should be an unusual very wide header format, approximately {argument name="aspect ratio" default="3:1"}, with the characters centered slightly right and plenty of cosmic scenery extending across the banner. No text, logos, watermarks, or UI elements.

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