Imagine a sleek, futuristic female Halloween-themed mecha with an elegant, haunting design. At its core, a glowing, carved pumpkin-like head, with sharp, angular features, is illuminated from within by a soft, eerie orange glow. Her armor is a blend of smooth black and silver metals, fitted with an athletic, feminine form, while neon orange lights trace intricate, graceful patterns along her limbs and torso. Her bat-wing-inspired jet boosters add a haunting silhouette, and a flowing cape, resembling digital smoke, trails behind her. Her hands, with sharp, polished claws, wield a scythe that emits a subtle, ethereal energy. The design is a perfect balance of mechanical power and Halloween allure, combining sleek lines, futuristic technology, and a refined, ghostly aesthetic for a mesmerizing and powerful look.