a cute smiling monster girl, adorable monster girl, Halloween monster, cute and spooky monster, whimsical monster, monster creature, monster girl with big eyes, monster girl with colorful hair, monster girl in a playful pose, monster girl with a friendly expression, playful monster, cute monster character, bright colors, pastel colors, soft lighting, fantasy art, digital painting, Artstation quality, 8k, highly detailed, intricate details, clean lines, smooth shading, painting style, happy Halloween