A medium shot from an upper-body angle captures a joyful summoner standing in a grand cathedral, centered in the composition. The summoner, a young woman with flowing long hair, wears a sophisticated magical robe featuring ornate koi fish motifs; she has an expression of overwhelming happiness, her eyes sparkling and mouth open in a cheer, while her hands are raised in a gesture of triumphant success. Floating around her is a complex, glowing magic circle from which several vivid Nishikigoi carp are summoned; a magnificent golden koi takes center stage, flanked by meticulously detailed red-white and tri-color koi that swim through the air. The scene is illuminated by the intense radiance of the magic circle and divine shafts of light streaming through high stained-glass windows, making the summoned fish glow like celestial messengers. The atmosphere is awe-inspiring and sacred, with a vibrant color palette, luminous particles, and a dramatic interplay of light and shadow in a high-quality anime illustration style.