Mark Cooper is an adventurous 13-year-old boy with a sprinkle of freckles across his cheeks, reflecting his time spent outdoors. He stands short and average for his age, with shaggy brown hair that adds to his youthful charm. His medium skin tone hints at a life filled with exploration under the sun. Mark is dressed in a comfortable T-shirt and trousers, perfect for hiking. His sturdy hiking boots are well-worn, showcasing his love for the great outdoors and his readiness for the next adventure.