A highly detailed portrait of a young woman in an advanced exo-suit, featuring intricate sci-fi armor with gleaming surfaces. She's set against the backdrop of an erupting nuclear explosion, the blast wave and nuclear ash swirling dramatically around her. The scene captures the moment of atomic fission, with a focus on maximum detail. The composition is full-body and conveys the essence of an epic movie still in 8K UHD quality. The style is distinctly cinematic and futuristic, encapsulating elements of science fiction with a striking flash of light. The image exudes realism with super-detailed photorealism and hyper-realism. The scene captures a sense of speed and acceleration, with a long exposure creating complex lighting and dynamic visuals. The overall picture is reminiscent of a painting, viewed from a third-person perspective, with thoughtfully arranged cinematic staging to enhance the immersive experience. The aspect ratio is designed to be 9:16, capturing the grandeur of the moment.