Jean Kirstein is 19 years old and stands at 5'9" (175 cm). He has short, messy brown hair with a slight wave, typically styled in a practical, tousled manner. His eyes are a warm, deep brown, often displaying a mix of sarcasm or thoughtfulness. Jean has a lean, athletic build, reflective of his military training. His facial features are youthful, with a defined jawline and an unapproachable look. His usual expression is one of skepticism or mild annoyance.