Create a full-body biomechanical robot with a focus on detailed, high-resolution linework and complex shadowing. The design must be fully finished and tattoo-ready, avoiding any sketch-like qualities. Use only black ink and smooth gradations to create deep contrasts, ensuring the metallic surfaces of the robot appear polished and realistic. The shading should be carefully planned, with deep blacks in recessed areas and lighter transitions to highlight the three-dimensional form. Every component, from the circuits to the armor plates, should be meticulously detailed, ensuring the tattoo captures a sense of depth, volume, and precision. The robot’s face should be visible through a helmet, with clear, expressive features blending human and robotic elements. The final design should feel cohesive, sharp, and highly finished, perfect for a tattoo with intricate shadows and high contrast." --niji 6