masterpiece, best quality, realistic, 1girl, secret demon-tech research lab, adult biomechanical prototype shaped like a woman in her late twenties, long dark hair with metallic strands, organic armor plates hugging her chest and hips with flexible sections between, predatory intense stare, leaning against a containment pillar with her tail-like cable wrapped around it, glowing runes etched into her armor, dark machinery humming around her