Design an anime-style transformation sequence featuring a young female character undergoing a dramatic muscular evolution. She begins as a slender girl, In the second stage, her physique becomes noticeably muscular: her biceps and forearms swell as veins subtly become visible, and her shoulders broaden. Her chest and torso begin to show toned definition, She flexes her arms confidently, her expression transitioning to one of self-assured power, In the final stage, her transformation reaches its peak, showcasing a massively muscular physique. Her arms are enormous, with deeply cut biceps and triceps bulging with veins. displaying a thick, muscular stomath with prominent abs. Her thighs and calves are massive,