masterpiece, best quality, score_7, safe, 1girl, solo, (loli, little, ultra cute kawaii:1.1), full body, athletic build, competitive swimsuit, streamlined design, sleek racing swimsuit, futuristic high-speed combat style, holding a long advanced railgun with both hands, large sci-fi railgun, precise mechanical design, high mobility, water spray, kicking across the ocean surface, speed effect, motion blur effect, focused expression, wind-swept hair, clear blue sky, open sea, futuristic combat heroine, dramatic action composition, leaning forward, aiming, anime