Create a concept art illustration of a witch in three different poses, depicted in a whimsical, caricature style. The witch should have exaggerated features, with playful, exaggerated proportions, giving her a mischievous and quirky personality. Her outfit and accessories should be rich in shades of violet, from deep purples to soft lavenders, with intricate details that add to the whimsical nature of the design. The overall vibe should be fun and slightly spooky, capturing the essence of a magical, yet lighthearted character. The background should be simple, allowing the witch's vibrant colors and exaggerated features to take center stage