In a dimly lit underwater lair, Rusalka stands majestically, her raven-black hair flowing like seaweed in the faint blue glow. Cybernetic implants glisten on her pale skin as she grasps a mechanical Trident of Poseidon, its metallic curves reflecting the water's surface. The surrounding darkness amplifies the eerie glow emanating from her eyes, filled with an otherworldly intensity.