Cute sci-fi anime adult mermaid cyborg girl underwater, side view, curled floating pose, short dark navy hair with wet strands covering one eye, pale skin, sleek high-tech harness and minimal swimsuit-like suit, translucent polymer armor panels over the hips and torso, visible inner mechanisms and fluid lines, biomechanical spine and joints, segmented metallic tail with soft rubbery fins, glowing cyan bioluminescent nodes along the tail and suit, complex mechanical fin apparatus attached to the waist and tail base (multiple articulated arms, hinges, pistons, and blade-like fins), bubbles rising around her, subtle suspended particles in water, soft gray-white underwater gradient background, calm dreamy atmosphere, high-detail cel shading, crisp lineart, sharp specular highlights on metal, gentle rim light, minimal color palette (cool grays, cyan accents),
