Create an image of Velma Dinkley's caricature. She should have oversized glasses, comically large and perpetually slipping down her nose, magnifying the intensity of her scrutiny. Her round figure should be clothed in a familiar turtleneck sweater and pleated skirt, emphasizing her practical, no-nonsense approach. The caricature should feature a perpetually furrowed brow and tightly pursed lips, suggesting ceaseless engagement with puzzles. Her short, blunt bob should be exaggerated, framing a face that conveys the weight of perpetual curiosity and an underlying dread of the unknown. Her stooped posture should be exaggerated, hinting at the burden of her intellectual pursuits, with the weight of countless mysteries on her shoulders. The overall tone should reflect a blend of humor and subtle sadness, capturing the Sisyphean nature of her quest for understanding in a stubbornly opaque world.