Create a realistic watercolor illustration of a 19-20-year-old young man

Create a realistic watercolor illustration of a 19-20-year-old young man, tall, attractive, and elegant. He has dark blonde hair and blue eyes. His skin is fair. Dorian should reflect his prince status with a carefree, charismatic attitude. He should be shown in full body, looking towards the viewer with a background that evokes a royal court or medieval castle atmosphere. Use luxurious colors and rich details in the background.