A highly detailed black-and-white ink sketch depicts a confident female cyberpunk mercenary standing in a dynamic full-body pose. She grips a heavy sci-fi pistol in her right hand with a firm stance, while her left arm is a massive, intricate mechanical prosthetic featuring exposed pistons, hydraulic joints, and armored plating. She wears a tactical crop top, fitted cargo pants with a heavy utility belt loaded with pouches and holsters, and rugged combat boots with knee pads. Steampunk goggles rest atop her tousled hair. The anatomy is rendered with anatomical precision, emphasizing muscle tone and organic flow, contrasting sharply with the hard-surface mechanical details of the arm. The linework is confident and fluid, utilizing expressive cross-hatching and controlled ink washes for depth. Faint ghosted sketches of a lion's head appear in the background, adding to the rough, master-sketch aesthetic. Dynamic composition, masterful ink control, intricate detailing, professional character design, masterpiece.