In a hyperrealistic style, depict a full-body portrait of an elegant woman clad in futuristic, iridescent, metallic armor, standing guard on the ramparts of a celestial fortress. The armor shimmers with a spectrum of cool colors, reflecting the ethereal glow of the aurora borealis dancing across the alien sky. The colossal fortress, made of gleaming, iridescent metal and crystal, rises majestically against the backdrop of the aurora, showcasing intricate architecture that speaks to an advanced civilization. The woman's pose conveys vigilant alertness, with her gaze fixed on the horizon and her hand resting on the hilt of a glowing, iridescent energy blade. Soft, glowing reflections on her armor emphasize its futuristic design and the subtle interplay of light and shadow. The celestial fortress, a bastion of power and knowledge, enhances the scene's awe-inspiring grandeur, with gleaming surfaces reflecting the vibrant aurora colors. The atmosphere embodies futuristic wonder and quiet determination, with the woman's presence adding ethereal grace. The overall effect captures breathtaking beauty and futuristic power, highlighting the allure of iridescent colors, human elegance, and advanced technology.

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